Peter Ridley

Peter Ridley is the main antagonist of the Hysteria episode of Law & Order: Special Victims Unit, or also known by its initials SVU, Peter is a police officer and NYPD's Vice Squad, who was soon investigated after the deaths of a prostitute, whom he had killed as a serial killer. Portrayed by Garrett M. Brown.

Background
Ridley was then raised by his mother who is was a prostitute who would simply lock him up so he could meet the custumers leaving him alone at dinner. Because of this Peter grew up and began to hate women and when at younger age Peter assaulted two prostitute and his wife, but despite this he managed to join the NYPD, and despite many diagnoses about his psychiatric evaluation, he did not disagree with a police officer, and continuing as a member of Vice Squad for thirty-one years during the years he raped and killed 18 prostitutes all that time.

Hysteria
Peter continued to kill, when a college student is found dead and raped, and since the area is well-known for prostitution, Elliot Stabler and Olivia Benson of the SVU begin to investigate the murders, they soon end up seeing the story of Ridley when they discover that he had investigated several crimes scenes in which one of the victims was found. Benson and Stabler eventually discover that Ridley has several complains of domestic violence and assault, and this psychological assessment has several diagnoses, while SVU captain Donald Cragen discovers with the help of his friend Lennie Briscoe that Ridley has several mood swings and is being forced to retire early becaus of it.

Soon after, Benson got evidence that puts Ridley at the crime scene. When detectives bring in Ridley for questioning, he soon quietly confesses to the murders Benson had discovered, he claims that he wants the murders recorded for later, but he denies having killed the college student, but they find out that she was killed by his ex-boyfriend, Ridley is then sentenced to death and executed.

Trivia

 * Ridley was the first serial killer to be execute in the Law & Order: Special Victims Unit franchise, this list would be followed by Darryl Kern of the second season, Malik Harris, Arthur Blessard and Matthew Linwood Brodus of the third season, Hope Garrett and Keith Gerard both also of the fouth season, and the last serial killer until then Adam Grafton that was most prolific serial killer of this list that appeared in the twelfth season.