1937 – Ressler Rob was born.
1970 – He served in the US Army before joining the FBI.
1980 – Ressler helped to organize the interviews of thirty-six incarcerated serial killers in order to find parallels between such criminal’s backgrounds and motives.
– This consists of a centralized computer database of information on unsolved homicides.
1990 – Ressler retired from the FBI and is the author of a number of books about serial murder.
1993 – He was brought in to London to assist in the investigation into the murders committed by Colin Ireland.
– John E. Douglas, whom Ressler was a mentor to at the FBI’s Behavioral Analysis Unit, as well as a colleague and friend.