Plot Synopsis

Narrated through the first-hand accounts of experts, observers closest to the case, and journalists who reported on the crime as it happened, SECRETS OF A PSYCHOPATH is a three-part true-crime documentary that chronicles the story of the most explosive and dramatic murder to come before the courts in Irish criminal history. In August 2012, three fishermen chanced upon a most unusual cache of intimate sex toys, abandoned in a reservoir situated just south of Dublin, Ireland. When the police linked the items to the discovery of a decomposed body in a forest 17 miles away, their investigation took on a more sinister dimension. This series explores the many coincidences, twists and turns of the investigation, uncovering an obsessive and unconventional relationship which ultimately ended in tragedy. Dark and disturbing text messages reveal a psychopath who groomed his trusting victim under the guise of extreme sadomasochistic practice and, more alarmingly, demonstrate the bloodlust obsessions of the killer as well as the level to which his victim was willing to acquiesce. The investigation, which spanned three police stations, over 5,000 hours of CCTV, numerous digital devices, hundreds of lines of enquiry and an online world involving domination, submission and torture, eventually saw police put the pieces together to identify the killer; a manipulative man hiding his evil fantasies behind a reputable and unassuming mask. SECRETS OF A PSYCHOPATH had its U.S. debut on Tuesday, March 23, 2021 at 3:01am ET/12:01am PT, as SundanceNow released all three episodes.