Mark Navarette, who is on death row for murder, speaks to members of the media from his cell on the East Block during a media tour of California's Death Row at San Quentin State Prison in San Quentin, California December 29, 2015. Picture taken December 29, 2015. REUTERS/Stephen Lam TPX IMAGES OF THE DAY

Robert Galvan, who is on death row for murder, speaks to members of the media at the Adjustment Center yard during a media tour of California's Death Row at San Quentin State Prison in San Quentin, California, December 29, 2015. REUTERS/Stephen Lam 

Douglas Clark, 67, who has been on death row for 33 years for murder, gestures from a cell at the Adjustment Center during a media tour of California's Death Row at San Quentin State Prison in San Quentin, California, December 29, 2015. REUTERS/Stephen Lam TPX IMAGES OF THE DAY

Myanmar migrant worker Win Zaw Htun (R) leaves after hearing the verdict at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai court sentenced the two Myanmar migrant workers to death on Thursday after convicting them of the 2014 murders of two British tourists on a holiday island in a case mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Zaw Lin leaves after hearing the verdict at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai court sentenced the two Myanmar migrant workers to death on Thursday after convicting them of the 2014 murders of two British tourists on a holiday island in a case mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant workers Zaw Lin (L) and Win Zaw Htun (R) leave after hearing the verdict at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai court sentenced the two Myanmar migrant workers to death on Thursday after convicting them of the 2014 murders of two British tourists on a holiday island in a case mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant workers Zaw Lin (L) and Win Zaw Htun (R) leave after hearing the verdict at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai court sentenced the two Myanmar migrant workers to death on Thursday after convicting them of the 2014 murders of two British tourists on a holiday island in a case mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Win Zaw Htun arrives at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Zaw Lin arrives at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Zaw Lin (L) and Win Zaw Htun arrive at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Zaw Lin (L) and Win Zaw Htun arrive at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Zaw Lin (L) and Win Zaw Htun arrive at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha 

Myanmar migrant worker Zaw Lin (L) and Win Zaw Htun arrive at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Myanmar migrant workers Zaw Lin (L) and Win Zaw Htun arrive at the Koh Samui provincial court in Koh Samui, Thailand, December 24, 2015. A Thai judge will announce the verdict against the two Myanmar migrant workers accused of killing two British tourists at the end of last year, following a trial that has been mired in controversy. REUTERS/Athit Perawongmetha 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, attends his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. At left is defense attorney Kristen Nelson and at right is defense attorney Rose Roy. REUTERS/Andy Cross/Pool 

A deputy tries to calm Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, as he spoke out at his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, attends his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, attends his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, is calmed by a deputy after making an outburst at his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, makes an outburst during his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, attends his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, attends his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, looks at his defense attorney Dan King during his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

A deputy tries to calm Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, as he spoke out at his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool 

Robert Lewis Dear, 57, accused of shooting three people to death and wounding nine others at a Planned Parenthood clinic in Colorado last month, attends his hearing to face 179 counts of various criminal charges at an El Paso County court in Colorado Springs, Colorado December 9, 2015. REUTERS/Andy Cross/Pool TPX IMAGES OF THE DAY

A suspect, detained by Burundian military and police, speaks to the media after they recovered a cache of ammunitions from combatants near Lake Tanganyika in the capital Bujumbura, December 9, 2015. REUTERS/Jean Pierre Aime Harerimana 

Accused Planned Parenthood gunman Robert Lewis Dear appears in court by video link from jail in Colorado Springs, Colorado in this November 30, 2015 still image from pool video. Dear is accused of killing three people and wounding nine in a November 27 shooting rampage at a Planned Parenthood clinic in Colorado Springs. Dear faces charges including first-degree murder. REUTERS/Pool 

Accused Planned Parenthood gunman Robert Lewis Dear (R)appears in court with public defender Dan King by video link from jail in Colorado Springs, Colorado in this November 30, 2015 still image from pool video. Dear is accused of killing three people and wounding nine in a November 27 shooting rampage at a Planned Parenthood clinic in Colorado Springs. Dear faces charges including first-degree murder. REUTERS/Pool 

Yosef Haim Ben-David (C) is escorted during his trial at the Jerusalem District Court November 30, 2015. Two Jewish minors were found guilty on Monday of the 2014 murder of Palestinian teenager Mohammed Abu Khudair in Jerusalem, but the Israeli court held off on formally convicting a third man accused of orchestrating the crime, pending a psychological review. Ben-David, a West Bank settler who works as a Jerusalem optician and who confessed to leading the crime, was also found guilty. But the court deferred formal conviction over his lawyers' 11th-hour request for a psychological evaluation. REUTERS/Ammar Awad TPX IMAGES OF THE DAY

Suspects of the August 17 Bangkok blast, who has been referred to as Yusufu Mieraili (2nd R), and Bilal Mohammed (also known as Adem Karadag), are escorted by soldiers and prison officers as they leave the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted the two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom

A suspect of the August 17 Bangkok blast, who has been referred to as Bilal Mohammed, also known as Adem Karadag, is escorted by soldiers and prison officers as he arrives at the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom

A suspect of the August 17 Bangkok blast, who has been referred to as Yusufu Mieraili, is escorted by soldiers and prison officers as he leaves the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom

Suspects of the August 17 Bangkok blast, referred to as Yusufu Mieraili (2nd L), and Bilal Mohammed (also known as Adem Karadag), are escorted by soldiers and prison officers as they leave the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom

Suspects of the August 17 Bangkok blast, Bilal Mohammed (also known as Adem Karadag) and Yusufu Mieraili, are escorted by soldiers and prison officers as they arrive at the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom

Suspects of the August 17 Bangkok blast, Bilal Mohammed (also known as Adem Karadag) and Yusufu Mieraili, are escorted by soldiers and prison officers as they arrive at the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom

Suspects of the August 17 Bangkok blast, Bilal Mohammed (also known as Adem Karadag) and Yusufu Mieraili are escorted by soldiers and prison officers as they arrive at the military court in Bangkok, Thailand, November 24, 2015. A Thai military court has indicted the two men accused of carrying out a Bangkok bomb attack that killed 20 people including 14 foreigners, making it the deadliest such incident in Thai history. A lawyer for one of the men said a Bangkok military court brought ten charges against the pair, including premeditated murder, illegal possession of weapons and murder. REUTERS/Chaiwat Subprasom TPX IMAGES OF THE DAY

Human trafficking suspect Patchuban Angchotipan, a former official in the provincial government of the southern province of Satun, arrives at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha 

Human trafficking suspect Patchuban Angchotipan, a former official in the provincial government of the southern province of Satun, arrives at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha 

Human trafficking suspects arrive at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha 

Human trafficking suspects arrive at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha 

Human trafficking suspects arrive at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha 

Lieutenant General Manas Kongpan (C), a suspected human trafficker, is escorted by officers as he arrives at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha TPX IMAGES OF THE DAY

Lieutenant General Manas Kongpan (C), a suspected human trafficker, is escorted by officers as he arrives at the criminal court in Bangkok, Thailand, November 10, 2015. Eighty-eight human trafficking suspects arrested as part of a crackdown on Thailand's lucrative smuggling and trafficking syndicates were brought before a Bangkok court on Tuesday to start examination of evidence and witnesses ahead of a trial. REUTERS/Athit Perawongmetha 

Ahmed Mahmoud Mustafa, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Saad Khalaf Ali, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari TPX IMAGES OF THE DAY

Saad Khalaf Ali, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Ahmed Mahmoud Mustafa, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Saad Khalaf Ali, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Ahmed Mahmoud Mustafa, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Mohammed Abd Ahmed (R) and Ahmed Mahmoud Mustafa, two of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, attend an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Mohammed Abd Ahmed, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Saad Khalaf Ali, one of the 69 hostages rescued from an Islamic State prison in a joint raid by U.S. and Kurdish special forces, speaks during an interview with Reuters in Erbil, Iraq, October 29, 2015. Reuters interviewed three of the rescued hostages at a security facility in the Kurdish regional capital Erbil. The men recounted their experiences of life under Islamic State rule, and the physical and psychological torment that often comes with it. Many of the prisoners were former members of the Iraqi security forces who fought some of the same insurgents before the militants overran a third of Iraq. Reuters could not independently verify the accounts. Picture taken October 29, 2015. REUTERS/Azad lashkari 

Kano State police paraded suspected cattle rustlers at Dajin Gomo village of Sumaila local government area Kano, Nigeria, November 2, 2015. The Police Command in Kano State on Monday said it had killed two suspected rustlers, recovered 441 cattle and 81 sheep in Falgore forest, Doguwa Local Government Area of the state according to local media. Picture taken November 2, 2015. REUTERS/Stringer? 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool 

Tyrone Howard appears at his arraignment in Manhattan Criminal Court in New York October 21, 2015.The man suspected of killing a New York City police officer on Tuesday had been the subject of a weeks-long manhunt by detectives in connection with a gang-related shooting last month, officials said on Wednesday. REUTERS/Jefferson Siegel/Pool