Previously believed to have been a serial killer, having confessed to more than 30 murders while incarcerated in a mental institution for personality disorders. Convicted of eight of these murders. TV3 aired a documentary that exposed serious flaws with the Quick investigation.

During the 1990s, Thomas Quick confessed to one unsolved murder after another, becoming, in the words of the father of one of his alleged victims, "a ghost who ran through Scandinavia killing more than 30 people".