Alain Lamare was born on July 10, 1956, in Fruges, Pas-de-Calais, France. He joined the French gendarmerie in the late 1970s, working in the Oise department. As a gendarme, his job was to enforce the law and investigate crimes.

By 1978, Lamare started showing strange behavior, becoming obsessed with certain women and displaying violent tendencies. Despite his position in law enforcement, he began committing serious crimes, including attacks on young women.

Between 1978 and 1979, Alain Lamare committed a series of murders, attempted murders, and violent attacks in the Oise department of France. His victims were mainly young women, whom he either shot, stabbed, or attacked in brutal ways.

One of his known victims was Eliane Pluet, a 17-year-old girl who was found dead on December 5, 1978. Another victim, Catherine, was attacked but survived, which helped police create a profile of the suspect.

Lamare would also vandalize cars and attack civilians at random, leaving the police with no clear motive for his crimes. He even sent taunting letters to law enforcement, mocking their inability to catch him.

What made the case shocking was that Lamare was part of the investigation team searching for the killer. Since he worked as a gendarme, he had access to police reports and search operations, allowing him to avoid capture for months.

In April 1979, police finally identified Lamare as the suspect. They searched his gendarmerie barracks and found evidence linking him to the crimes, including weapons and notes about his attacks. He was arrested soon after.

Instead of facing a criminal trial, Lamare was declared mentally unfit to stand trial due to a severe psychiatric disorder. He was placed in a psychiatric hospital, where he remained instead of being sent to prison.