Ever wonder what makes an otherwise normal person into a serial killer? Well, that’s a question that has plagued psychologists for years. BUT, we do know a few contributing factors can be a history of abuse, previous trauma, past head injuries, AND… there’s also a set of 3 factors that can be predictive of whether or not someone becomes a serial killer – and it’s called… The Macdonald triad.The Macdonald triad was first proposed by psychiatrist J. M. Macdonald, who believed that these three things – first, cruelty to animals, second, an obsession with fire-setting, and lastly, persistent bedwetting, are linked to violent or homicidal behaviors later in life. The Macdonald triad has been present in many criminals and murders, including the well-known serial killer Ed Kemper.So next time little Johnny reaches for the matches after kicking the dog and wetting the bed… watch out…..you just might have a future serial killer on your hands. This has been the true crime irl murder minute…and I’m kelli berens brink reminding you to lock your doors people – bye byeTRUECRIMEIRL.COM---SOURCES:https://www.psychologytoday.com/us/blog/shadow-boxing/201203/triad-evil---MUSIC:Come Play with Me by Kevin MacLeodLink: https://incompetech.filmmusic.io/song/3526-come-play-with-meLicense: https://filmmusic.io/standard-license--- Support this podcast: https://anchor.fm/truecrimeirl/support