Organized Offender Killers

Devin Patrick Kelley is the perpetrator of the deadliest mass shooting in Texas history, which occurred at a church in 2017

Devon Arthurs, a former Neo-Nazi, confessed to murdering his roommates in 2025.

Dillon Alexander Waller is an American man convicted of the 2022 murder of his mother in New Mexico. The crime occurred within a domestic setting and involved attempts to conceal the offence. He was later convicted of first-degree murder and sentenced to life imprisonment.

Donald Blom is a serial killer, also known as The Chameleon, who is the subject of the documentary.

Dr. Donald Cline impregnated over 90 patients without their consent, resulting in multiple unwanted pregnancies.

Donald Davidson was sentenced to death for murdering a mother in 2026, 72 days after his prison release.

Donato Bilancia is known as Italy's worst serial killer.