A forensic toxicology chemist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A forensic toxicology chemist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

A forensic toxicology chemist works at the Institute for Forensic Medicine of Belgrade's Medical Faculty, in Belgrade, Serbia, February 22, 2021. Picture taken February 22, 2021. REUTERS/Marko Djurica

Pablo Aviles, head of Nonclinical Toxicology and Pharmacology at PharmaMar, poses for a portrait at a PharmaMar lab, amid the coronavirus disease (COVID-19) outbreak, in Colmenar Viejo, Spain January 26, 2021. REUTERS/Susana Vera

An employee of the Athens Laboratory of Forensic Medicine and Toxicology, which handles DNA samples taken from the victims of a wildfire, talks on his mobile phone next to a hearse in Athens, Greece, July 26, 2018. REUTERS/Costas Baltas

Employees of the Athens Laboratory of Forensic Medicine and Toxicology, which handles DNA samples taken from the victims of a wildfire, walk next to a van in Athens, Greece, July 26, 2018. REUTERS/Costas Baltas

A member of the department of toxicology works on packets of cocaine during a presentation to the media at a naval base in Tegucigalpa, April 23, 2015. Authorities on Tuesday seized 450 kg (992 pounds) of cocaine hidden inside six boats in Caratasca lagoon in Puerto Lempira city, according to local media. REUTERS/Jorge Cabrera

A member of the department of toxicology writes on packets of cocaine during a presentation to the media at a naval base in Tegucigalpa, April 23, 2015. Authorities on Tuesday seized 450 kg (992 pounds) of cocaine hidden inside six boats in Caratasca lagoon in Puerto Lempira city, according to local media. REUTERS/Jorge Cabrera

General view of the Justizanstalt Wien-Josefstadt prison in Vienna February 27, 2015. Sedatives have been found in the body of Rakhat Aliyev, a prominent Kazakh dissident found hanged in the prison this week in what authorities say was suicide. An initial toxicological test on Aliyev showed traces of barbiturates, a spokeswoman for prosecutors in Vienna said, stressing it may take days for the final autopsy report to come through. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: CRIME LAW POLITICS)

Forensic scientists analyze samples in the Toxicology department at Punjab Forensic Science Agency in Lahore January 13, 2015. As one of America's top forensic scientists, Mohammad Tahir uncovered evidence that helped jail boxer Mike Tyson for rape, convict serial killer John Wayne Gacy and clear doctor Sam Sheppard of murdering his wife. Then Tahir took on his toughest assignment yet - applying his skills in Pakistan, a poor nation of 180 million people beset by crime and militancy. Picture taken January 13, 2015. REUTERS/Zohra Bensemra (PAKISTAN - Tags: SCIENCE TECHNOLOGY CRIME LAW)

A forensic scientist carries samples to analyze in the Toxicology department at Punjab Forensic Science Agency in Lahore January 13, 2015. As one of America's top forensic scientists, Mohammad Tahir uncovered evidence that helped jail boxer Mike Tyson for rape, convict serial killer John Wayne Gacy and clear doctor Sam Sheppard of murdering his wife. Then Tahir took on his toughest assignment yet - applying his skills in Pakistan, a poor nation of 180 million people beset by crime and militancy. Picture taken January 13, 2015. REUTERS/Zohra Bensemra (PAKISTAN - Tags: SCIENCE TECHNOLOGY CRIME LAW)

Kerry Kennedy, (2nd L) daughter of assassinated Senator Robert F. Kennedy and ex-wife of New York Governor Andrew Cuomo, exits the Westchester County Courthouse in White Plains, New York, next to her mother, Ethel Kennedy (bottom), and her brother, Douglas Harriman Kennedy (C), February 24, 2014. Kerry, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy, (L) daughter of assassinated Senator Robert F. Kennedy and ex-wife of New York Governor Andrew Cuomo, exits the Westchester County Courthouse in White Plains, New York, next to her mother, Ethel Kennedy (bottom R), and her brother, Douglas Harriman Kennedy, February 24, 2014. Kerry, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy, (L, front) daughter of assassinated Senator Robert F. Kennedy and ex-wife of New York Governor Andrew Cuomo, exits the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kerry, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy, (3rd L) daughter of assassinated Senator Robert F. Kennedy and ex-wife of New York Governor Andrew Cuomo, walks on a street after exiting the Westchester County Courthouse next to her mother, Ethel Kennedy (on a wheelchair), and her brother ,Douglas Harriman Kennedy (3rd R), in White Plains, New York, February 24, 2014. Kerry, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS TPX IMAGES OF THE DAY)

Ethel Kennedy, mother of Kerry Kennedy, arrives at the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kerry Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Ethel Kennedy (L), mother of Kerry Kennedy, arrives at the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kerry Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy (C), daughter of assassinated Senator Robert F. Kennedy and the ex-wife of New York Governor Andrew Cuomo, arrives at the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping mediation in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy, daughter of assassinated Senator Robert F. Kennedy and the ex-wife of New York Governor Andrew Cuomo, arrives to the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy, daughter of assassinated Senator Robert F. Kennedy and the ex-wife of New York Governor Andrew Cuomo, arrives to the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Kerry Kennedy, daughter of assassinated Senator Robert F. Kennedy and the ex-wife of New York Governor Andrew Cuomo, arrives to the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: POLITICS CRIME LAW)

Kerry Kennedy, daughter of assassinated Senator Robert F. Kennedy and the ex-wife of New York Governor Andrew Cuomo, arrives to the Westchester County Courthouse in White Plains, New York, February 24, 2014. Kennedy, 54, is charged with one count of driving while impaired, a misdemeanor. No one was injured in the accident in a suburb of New York City. Kennedy initially said a partial seizure was to blame but a toxicology report showed that she had sleeping medication in her system. REUTERS/Eduardo Munoz (UNITED STATES - Tags: CRIME LAW POLITICS)

Forensic scientists analyze samples in the Toxicology lab during a tour of the Orange County, California Crime Lab in Santa Ana, California August 14, 2013. REUTERS/Lori Shepler (UNITED STATES - Tags: CRIME LAW)

A forensic scientist analyzes samples in the Toxicology lab during a tour of the Orange County, California Crime Lab in Santa Ana, California August 14, 2013. REUTERS/Lori Shepler (UNITED STATES - Tags: CRIME LAW)

Forensic scientists analyze samples in the Toxicology lab during a tour of the Orange County, California Crime Lab in Santa Ana, California August 14, 2013. REUTERS/Lori Shepler (UNITED STATES - Tags: CRIME LAW)

Children are put on drips as many of them are diagnosed with respiratory diseases at a provincial children's hospital in Hefei, Anhui province January 16, 2013. Days after choking smog blanketed China's capital, the country's premier-designate added his voice to appeals to curb the toxic haze, but he offered few specifics and said there was no quick fix. Particulate matter with a 2.5 micrometer diameter, known as PM2.5, can cause cardiopulmonary disease, lung cancer and acute respiratory infection, according to the Journal of Toxicology and Environmental Health. REUTERS/Stringer (CHINA - Tags: HEALTH ENVIRONMENT SOCIETY)

A nurse puts in a drip for a baby diagnosed with respiratory diseases at a provincial children's hospital in Hefei, Anhui province January 16, 2013. Days after choking smog blanketed China's capital, the country's premier-designate added his voice to appeals to curb the toxic haze, but he offered few specifics and said there was no quick fix. Particulate matter with a 2.5 micrometer diameter, known as PM2.5, can cause cardiopulmonary disease, lung cancer and acute respiratory infection, according to the Journal of Toxicology and Environmental Health. REUTERS/Stringer (CHINA - Tags: HEALTH ENVIRONMENT SOCIETY)

A medical chart titled "Summary of Positive Toxicological Findings: Jackson, Michael Joseph" is projected onto a screen during the questioning of witness Dr. Paul White, an anaesthesiologist and propofol expert, in the final stage of Dr. Conrad Murray's defense case at Murray's involuntary manslaughter trial in Los Angeles October 28, 2011. Murray, who has pleaded not guilty, faces up to four years in prison if convicted in Michael Jackson's death. REUTERS/Paul Buck/Pool (UNITED STATES - Tags: CRIME LAW ENTERTAINMENT)

A stomach analysis for pop star Michael Jackson is projected onto a screen as Deputy District Attorney David Walgren questions Michael Dean Henson (not pictured), the Technical Operations Officer for Pacific Toxicology Labs, in Dr. Conrad Murray's involuntary manslaughter trial in Los Angeles October 25, 2011. REUTERS/Paul Buck/Pool (UNITED STATES - Tags: CRIME LAW)

Michael Dean Henson, Technical Operations Officer for Pacific Toxicology Labs, testifies in Dr. Conrad Murray's involuntary manslaughter trial in the death of pop star Michael Jackson in Los Angeles October 25, 2011. REUTERS/Paul Buck/Pool (UNITED STATES - Tags: CRIME LAW)

Defense attorney J. Michael Flanagan (R) approaches witness Michael Dean Henson (L), Technical Operations Officer for Pacific Toxicology Labs, during Dr. Conrad Murray's involuntary manslaughter trial in the death of pop star Michael Jackson in Los Angeles October 25, 2011. REUTERS/Paul Buck/Pool (UNITED STATES - Tags: CRIME LAW)

A stomach analysis for pop star Michael Jackson is projected onto a screen during the questioning of witness Michael Dean Henson (not pictured), the Technical Operations Officer for Pacific Toxicology Labs, in Dr. Conrad Murray's involuntary manslaughter trial in Los Angeles October 25, 2011. REUTERS/Paul Buck/Pool (UNITED STATES - Tags: CRIME LAW)

A Lorazepam blood level result for pop star Michael Jackson is projected on a screen as defense attorney J. Michael Flanagan questions Michael Dean Henson (not pictured), the Technical Operations Officer for Pacific Toxicology Labs, in Dr. Conrad Murray's involuntary manslaughter trial in Los Angeles October 25, 2011. REUTERS/Paul Buck/Pool (UNITED STATES - Tags: CRIME LAW)

Dr. Conrad Murray listens to a toxicology testimony in a darkened courtroom as slides are presented into evidence during his trial in the death of pop star Michael Jackson in Los Angeles October 6, 2011. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT CONFLICT SOCIETY)

A summary of Michael Jackson's toxicology report is seen as evidence projected on a courtroom screen during Dr.Conrad Murray's trial in the death of Jackson in Los Angeles October 6, 2011. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT CRIME LAW)

Part of Michael Jackson's toxicology report is seen as evidence projected on a courtroom screen during Dr.Conrad Murray's trial in the death of Jackson in Los Angeles October 6, 2011. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT CONFLICT SOCIETY)

Michael Jackson's toxicology report is seen as evidence projected on a courtroom screen during Dr. Conrad Murray's trial in the death of Jackson in Los Angeles October 6, 2011. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT CRIME LAW)

A rat genome gene chip is shown to the media by Karol Thompson, Lead Pharmacologist in the Molecular Toxicology lab at the U.S. Food and Drug Administration (FDA) headquarters in Silver Spring, Maryland, November 5, 2009. Watching on is biologist Barry Rosenzweig. REUTERS/Jason Reed (UNITED STATES HEALTH SCI TECH)

Jun Zhang, Toxicologic Pathologist/Pharmacologist at the U.S. Food and Drug Administration (FDA), speaks to the media alongside a digital scan of a kidney during a tour of the FDA headquarters in Silver Spring, Maryland, November 5, 2009. REUTERS/Jason Reed (UNITED STATES HEALTH SCI TECH)

A rat genome gene chip is shown in the Molecular Toxicology lab at the U.S. Food and Drug Administration (FDA) headquarters in Silver Spring, Maryland, November 5, 2009. REUTERS/Jason Reed (UNITED STATES HEALTH SCI TECH)

Rat genome gene chips are shown in the Molecular Toxicology lab at the U.S. Food and Drug Administration (FDA) headquarters in Silver Spring, Maryland, November 5, 2009. REUTERS/Jason Reed (UNITED STATES HEALTH SCI TECH)

Chief Coroner Investigator Craig Harvey makes a statement to the media across the street from the County of Los Angeles Department of Coroner facility following the completion of an autopsy performed on Michael Jackson June 26, 2009. Harvey announced that the cause of death has been deferred pending the receipt of additional toxicological tests and tissue studies. REUTERS/Phil McCarten (UNITED STATES ENTERTAINMENT OBITUARY)

French toxicologist and forensic specialist Pascal Kintz poses in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. Kintz revealed on Thursday that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair.

French toxicologist and forensic specialist Pascal Kintz poses in front of a graph showing an unusual concentration of mineral arsenic detected in samples of French emperor Napoleon's hair in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. Kintz revealed on Thursday that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair.

Samples of French emperor Napoleon's hair preserved since his death in 1821 and attached on a certificate of authenticity are displayed near his insignia in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. French toxicologist and forensic specialist Pascal Kintz revealed on Thursday in Strasbourg that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair to show unusual concentration of mineral arsenic.

Samples of French emperor Napoleon's hair preserved since his death in 1821 and attached on a certificate of authenticity are displayed near his insignia in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. French toxicologist and forensic specialist Pascal Kintz revealed on Thursday in Strasbourg that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair to show unusual concentration of mineral arsenic.

Press photographers take pictures of samples of French emperor Napoleon's hair preserved since his death in 1821 and attached on a certificate of authenticity displayed in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. French toxicologist and forensic specialist Pascal Kintz revealed on Thursday in Strasbourg that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair to show unusual an concentration of mineral arsenic. REUTERS/Vincent Kessler VK/dh

French toxicologist and forensic specialist Pascal Kintz poses in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. Kintz revealed on Thursday that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair. REUTERS/Vincent Kessler VK/dh

French toxicologist and forensic specialist Pascal Kintz poses in front of a graph showing an unusual concentration of mineral arsenic detected in samples of French emperor Napoleon's hair in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. Kintz revealed on Thursday that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair. REUTERS/Vincent Kessler VK/dh

Samples of French emperor Napoleon's hair preserved since his death in 1821 and attached on a certificate of authenticity are displayed near his insignia in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. French toxicologist and forensic specialist Pascal Kintz revealed on Thursday in Strasbourg that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair to show unusual concentration of mineral arsenic. REUTERS/Vincent Kessler VK/dh

Samples of French emperor Napoleon's hair preserved since his death in 1821 and attached on a certificate of authenticity are displayed near his insignia in the "Chem Tox " toxicology laboratory in Illkirch Graffenstaden near Strasbourg June 2, 2005. French toxicologist and forensic specialist Pascal Kintz revealed on Thursday in Strasbourg that he could prove that Napoleon died of arsenic poisoning by conducting a chemical analysis of his hair to show unusual concentration of mineral arsenic. REUTERS/Vincent Kessler VK/dh

A policeman guards a hospital room of the toxicology department of
Munich's university clinic October 28, 2002. Two Germans, a man and a
woman who were flown out of Russia early on Sunday after the Moscow
hostage drama ended, are under medical supervision in the southern
German town of Munich. Thomas Zilker, head of the toxicology department
of Munich's university clinic, said one of the patients was still in
intensive care, but would likely soon be released. REUTERS/Michael
Dalder

MAD/CMC

THOMAS ZILKER HEAD OF MUNICH UNIVERSITY CLINIC'S TOXICOLOGY DEPARTMENT
USE A MOBILE PHONE BEFORE A NEWS CONFERENCE IN MUNICH.

THOMAS ZILKER HEAD OF MUNICH UNIVERSITY CLINIC'S TOXICOLOGY DEPARTMENT
TALKS ON A MOBILE PHONE BEFORE A NEWS CONFERENCE IN MUNICH.

A policeman guards a hospital room of the toxicology department of
Munich's university clinic October 28, 2002. Two Germans, a man and a
woman who were flown out of Russia early on Sunday after the Moscow
hostage drama ended, are under medical supervision in the southern
German town of Munich. Thomas Zilker, head of the toxicology department
of Munich's university clinic, said one of the patients was still in
intensive care, but would likely soon be released. REUTERS/Michael
Dalder

MAD/CMC

A human wall of bodies blocks the press from seeing the casket containing the body of comedian Christopher Farley leaving Our Lady Queen of Peace Catholic Church in Madison, Wisconsin December 23. Farley was found dead in his Chicago apartment last December 18. The cause of his death remained undetermined pending toxicology tests.The family requested a private service without press coverage.

ENTERTAINMENT FARLEY

The hearse carrying the body of comedian Christopher Farley enters Resurrection Cemetery in Madison, Wisconsin December 23. A funeral service was held for Farley in the chapel in the background. Farley was found dead in his Chicago apartment December 18. The cause of his death remained undetermined pending toxicology tests.

ENTERTAINMENT FARLEY

Comedian George Wendt (back to camera) finishes a story as comedian Al Franken (L-center) and others react following a funeral service for Christopher Farley at Resurrection Cemetery in Madison, Wisconsin December 23. Farley was found dead in his Chicago apartment December 18. The cause of his death remained undetermined pending toxicology tests.

FARLEY