The Boston Strangler | Ultimate

: In July 2013, modern forensic testing linked DeSalvo's DNA to the 1964 murder of Mary Sullivan , the last known victim. While this definitively tied him to one crime, it did not prove he was responsible for all of them, leaving the "multiple killers" theory alive for some.

: The killer typically entered homes without force, suggesting the victims either knew him or believed he was a service provider. The Boston Strangler

, a factory worker and military veteran, became the primary suspect after confessing to 11 of the Strangler murders while in prison for unrelated rapes. : In July 2013, modern forensic testing linked

Over an 18-month period, ranging in age from 19 to 85 were murdered in their homes. , a factory worker and military veteran, became

: Many officials and families of the victims doubted his confession due to its inconsistencies and a lack of physical evidence at the time.

: DeSalvo later recanted his confession before being stabbed to death in prison in 1973.