Former cops gone bad

Christopher Dorner, a former LAPD officer suspected of killing four people, died after a shootout and fire on Feb. 12, 2013 at a mountain cabin in Calif. following one of the biggest manhunts in recent memory. Dorner posted a "manifesto" explaining that his actions were part of a revenge-driven against the LAPD. He claimed he had been the victim of racism and unfair treatment while employed by the department. Prior to the standoff that led to Dorner's death on Feb. 12, 2013, he was already believed to have killed three people, one being a police officer. During the standoff he allegedly shot and killed another officer.

Gilberto Valle

Gilberto Valle, otherwise known as the "cannibal cop," was arrested in October 2012 after allegedly plotting to kidnap women and eat their body parts. The 28-year-old former New York City cop was found guilty on March 12, 2013, of conspiracy and illegally accessing a law-enforcement database. A federal judge overturned his conviction on June 30, 2014, citing insufficient evidence.

Drew Peterson

Drew Peterson, a former suburban Chicago police officer, was sentenced on Feb. 21, 2013 to 38 years in prison for murdering his third wife, Kathleen Savio, in 2004. Savio was found in a dry bathtub at home with a gash on her head - her hair soaked in blood. The 59-year-old Peterson is also a suspect in the disappearance of his fourth wife, Stacy Peterson. He has not been charged in her case.

Jonathan Josey

Jonathan Josey, a former Philadelphia police lieutenant, was charged with striking a woman at a Puerto Rican Day celebration in September 2012, CBS Philly reported. The incident was caught on tape, and the subsequent investigation led to Josey's termination from the force. On Feb. 26, 2013 a judge ruled that Josey was not guilty of simple assault. John McGrody, a vice president in the Philadelphia police officers

Manuel Pardo

Manuel Pardo, a 56-year-old former Florida police officer convicted of murdering nine people in a 1986 rampage, was executed in December 2012 by lethal injection. Officials said most of Pardo's victims were involved with drugs and were killed over the span of three months. Pardo contended that he was doing the world a favor by killing them in 1986. Pardo was dubbed the "Death Row Romeo" after he corresponded with dozens of women and persuaded many to send him money.

Jack McCullough

Jack McCullough, a 73-year-old former Washington state policeman, was sentenced to life in prison in Dec. 2012 for kidnapping and murdering 7-year-old Maria Ridulph in 1957. Prosecutors contended that McCullough, formerly known as John Tessier, dragged Maria into an alley and choked her with a wire, then stabbed her in the throat and chest. Then he allegedly loaded her body into his car and drove more than 100 miles to where he disposed of her body in a wooded area. Ridulph's disappearance drew national attention prior to the discover of her body in April 1958. President Dwight Eisenhower and FBI Director J. Edgar Hoover reportedly asked for regular updates on the case.

Robert Alvarez

Robert Alvarez, a suspended South Texas police officer, was charged in April 2011 with filing bogus time sheets and having sexual relations with a jailed female robbery suspect. According to the McAllen Monitor, Alvarez's indictment says he misused official information, violated an inmate's civil rights and filed incorrect time sheets involving overtime pay.

Eddy Coello

Eddy Coello, a former NYPD officer, was charged in March 2011 with second-degree murder in the death of his wife, Tina Adovasio (pictured). Prosecutors said Coello strangled his wife, carried her dead body to his car and dumped it in the woods in Yorktown, N.Y. According to the NYPD, the 40-year-old Adovasio died of asphyxiation and also suffered blunt trauma to the head and chest. Coello was a NYPD officer for four years. He resigned from the force in 2000 during a domestic violence investigation involving a former wife. Coello was convicted in Oct. 2012 in the slaying of Adovasio, CBS New York reports. He was sentenced to 25 years to life.

David Bourque

David Bourque, a former Granby, Conn. police captain, was sentenced to 10 years in prison in Feb. 2012 for amassing what authorities said was one of the largest and most disturbing child pornography collections they

Gabriel Morris

Gabriel Morris, a former sheriff's deputy in Idaho, was convicted in Aug. 2011 of two counts of aggravated murder in the Feb. 2010 shooting deaths of his mother, Robin Anstey, and her boyfriend, Rober Kennelly, CBS affiliate KCBY reported. Morris had admitted to the shooting deaths, but the question was whether or not he was legally insane. A judge ruled that Morris had the capacity to control his actions and understand the criminality of his conduct, according to the station. Morris was sentenced to two consecutive life terms in prison, without the possibility of parole.