Former New Orleans Mayor C. Ray Nagin (C) and his wife Seletha leave court after Nagin was sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Federal prosecutor Matt Coman (C) and his team arrive at court for former New Orleans Mayor C. Ray Nagin's sentencing hearing in New Orleans, Louisiana July 9, 2014. Nagin was sentenced on Wednesday to 10 years in federal prison on corruption charges that arose in the wake of Hurricane Katrina. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Clarence Ray Nagin Sr., father of former New Orleans Mayor C. Ray Nagin, arrives with an unidentified woman at court for his son's sentencing hearing in New Orleans, Louisiana July 9, 2014. Nagin was sentenced on Wednesday to 10 years in federal prison on corruption charges that arose in the wake of Hurricane Katrina. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor C. Ray Nagin leaves court after being sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS HEADSHOT) 

Former New Orleans Mayor C. Ray Nagin leaves court after being sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor C. Ray Nagin (C) and his attorney Robert Jenkins (2nd L) leave court after Nagin was sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor C. Ray Nagin and his wife Seletha leave court after Nagin was sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor C. Ray Nagin leaves court after being sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS TPX IMAGES OF THE DAY) 

Former New Orleans Mayor C. Ray Nagin leaves court after being sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor C. Ray Nagin leaves court after being sentenced to 10 years in New Orleans, Louisiana July 9, 2014. A jury in February found Nagin guilty of charges including bribery, wire fraud, conspiracy, money laundering and tax evasion, all in the wake of Hurricane Katrina. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor C. Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. A federal jury on Wednesday found Nagin guilty of accepting bribes and trading on the public trust during the critical years of rebuilding after Hurricane Katrina devastated the city in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS TPX IMAGES OF THE DAY) 

Federal prosecutors Matt Coman (L) leaves the courthouse after former mayor Ray Nagin was found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (L) and his attorney Robert Jenkins (R) leave the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (C) and his wife Seletha Smith (L) leave the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (C) and his attorney Robert Jenkins (R) leave the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin walks past stands set up for Mardi Gras after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (C) and his attorney Robert Jenkins (R) leave the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS TPX IMAGES OF THE DAY) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin leaves the courthouse after being found guilty on graft charges in New Orleans, Louisiana February 12, 2014. Nagin, 57, was standing trial on 21 counts of corruption, including bribery, conspiracy, money laundering and tax evasion during the city's recovery from Hurricane Katrina in 2005. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (R) and his attorney Robert Jenkins arrive at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (R) and his attorney Robert Jenkins arrive at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin (R) and his attorney Robert Jenkins arrive at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS) 

Former New Orleans Mayor Ray Nagin arrives at court in New Orleans February 20, 2013. A federal grand jury in January charged Nagin, who as mayor denounced the federal government response to Hurricane Katrina, with 21 counts of public corruption including receiving thousands of dollars in kickbacks for city services. REUTERS/Jonathan Bachman (UNITED STATES - Tags: CRIME LAW POLITICS TPX IMAGES OF THE DAY) 

Revelers carry a banner referring to outgoing New Orleans mayor Ray Nagin during the Krewe du Vieux Mardi Gras parade in New Orleans January 30, 2010. The city holds its mayoral primary February 6. REUTERS/Lee Celano (UNITED STATES - Tags: SOCIETY POLITICS) 

Ray Nagin, mayor of New Orleans (L), speaks with Rev. Jesse Jackson at the Clinton Global Initiative in New York September 22, 2009. About 1,200 participants including heads of state, business leaders, humanitarians and celebrities will attend the fifth annual Clinton Global Initiative (CGI) which started on Tuesday. REUTERS/Chip East (UNITED STATES POLITICS) 

New Orleans Mayor C. Ray Nagin makes an address at a public forum as part of the Sustainable Globalisation summit in Sydney June 11, 2009. Mayor Nagin spoke of many of New Orleans' actions in dealing with the impact of Hurricane Katrina at the forum titled "Sydney and New Orleans: The role of city governments in adapting to climate change". REUTERS/Tim Wimborne (AUSTRALIA POLITICS ENVIRONMENT) 

New Orleans Mayor C. Ray Nagin makes an address at a public forum as part of the Sustainable Globalisation summit in Sydney June 11, 2009. Mayor Nagin spoke of many of New Orleans' actions in dealing with the impact of Hurricane Katrina at the forum titled "Sydney and New Orleans: The role of city governments in adapting to climate change". REUTERS/Tim Wimborne (AUSTRALIA POLITICS ENVIRONMENT) 

New Orleans Mayor C. Ray Nagin makes an address at a public forum as part of the Sustainable Globalisation summit in Sydney June 11, 2009. Mayor Nagin spoke of many of New Orleans' actions in dealing with the impact of Hurricane Katrina at the forum titled "Sydney and New Orleans: The role of city governments in adapting to climate change". REUTERS/Tim Wimborne (AUSTRALIA POLITICS ENVIRONMENT) 

Residents of New Orleans rescued by police boats walk from floodwaters in front of the Superdome in New Orleans September 1, 2005. New Orleans Mayor Ray Nagin issues an urgent plea for relief, saying the flooded city lacks food for thousands of Hurricane Katrina's refugees as well as buses to evacuate them. REUTERS/Jason Reed JIR/mk BEST QUALITY AVAILABLE 

New Orleans' Mayor Ray Nagin (C) speaks after meeting with U.S. President Barack Obama at the U.S. Conference of Mayors event in the East Room of the White House in Washington, February 20, 2009. From L-R are: Miami Mayor Manuel Diaz, Nagin, and Trenton Mayor Douglas Palmer. REUTERS/Larry Downing (UNITED STATES) 

The glass windows of a store are boarded up in preparation for Hurricane Gustav in Metairie, Louisiana, August 29, 2008. New Orleans Mayor Ray Nagin on Saturday ordered an evacuation of the city starting early on Sunday to prepare for what he called "the mother of all storms." Picture taken August 29, 2008. REUTERS/Bill Auth (UNITED STATES) 

Lower Ninth Ward resident Rev. Willie Calhoun removes belongings from his Federal Emergency Management Agency trailer before evacuating New Orleans, Louisiana from Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Residents board a bus at an evacuation center in New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Volunteers assist a handicapped man onto a bus at an evacuation center in New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Residents walk towards an evacuation center in New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

A girl waits with other residents to board buses and trains to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav, August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Residents wait to board buses and trains to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav, August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Mayor Ray Nagin speaks at a press briefing on Hurricane Gustav in New Orleans, Louisiana August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Kalyana, Ralphmon and Hakeem Green wait for their mother before boarding a bus to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

National guardsmen load a resident's dog onto a bus to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

National guardsmen load a resident's dog onto a bus to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Pets are checked in as residents prepare to board buses and trains to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav, August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Police direct residents waiting to board buses and trains to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav, August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Residents wait to board buses and trains to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav, August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Elderly residents wait to board buses and trains to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav, August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Residents board a bus to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES) 

Residents board a bus to evacuate New Orleans, Louisiana, ahead of Hurricane Gustav August 30, 2008. City officials could order a mandatory evacuation of New Orleans starting early on Sunday if Hurricane Gustav holds to its current course, New Orleans Mayor Ray Nagin said on Saturday. REUTERS/Lee Celano (UNITED STATES)