A Swedish serial killer named Peter Mangs lived in Boca Raton on and off and frequented the Town Center mall in Boca Raton around the same time as a series of infamous murders took place there, according to a new documentary, which claims that Mangs could be the killer police have been looking for over the last 16 years. A three-part series called “Under the Radar” follows a Swedish documentarian named John Mork and a former investigator, now TV personality, Jim Rathmann as they seek to unravel clues left by Mangs, a musician-turned-killer, about murders that he may have committed in Florida and for which they say he was never charged. Jim Rathmann and John Mork sit in a car as they discuss their investigation.