William "Billy" Mansfield Jr. (born 1956) is an American serial killer, child molester and sex offender, responsible for the murders of five women and girls between 1975 and 1980.

He buried the bodies of four victims at the family home in Spring Hill, Florida, and later traveled with his brother to California, where he raped and strangled a Watsonville woman.

[2] Despite this the younger Mansfield claimed that he had a good upbringing and got along with his family, but that changed when he was 14, when he dropped out of school and altered his birth certificate so he could serve in the Army.

[3] According to Spielmaker, Billy, a closeted bisexual, often brought men from gay bars home and had sex with them in front of her, and one time discussed a murder with her.

On the other hand, there were also reported sightings of Elaine talking to a man in his twenties near the shower area, and later entering his car, a light blue 1966 Ford Fairlane with Florida license plates.

[10] On June 19, 1980, he forced 18-year-old Pamela Sherrell into his van and drove to a rented trailer, where he proceeded to hit her, cutting her lip and bruising her neck.

[12] On December 7, 1980, the half-naked body of 29-year-old René Saling was found at a drainage ditch at the side of the Buena Vista Road in Watsonville, California by passing motorists.

The two men lied about their identities and ages, but the officer noticed that their physical description matched the Mansfield brothers, and took them into custody at the Humboldt County jail.

They were determined to be the following: The skulls of the two Jane Does were later sent for reconstruction at the Colorado State University, with the task headed by retired anthropology professor Dr. Michael Charney.

Mansfield was also briefly considered a suspect in the murders of 19-year-old Cynthia Clements, 19-year-old Elizabeth Margaret Graham, both of whom were killed in a similar manner and sexually assaulted.

[37] Following the arrest of his brother, Gary Mansfield, for drug charges on October 27, 2020, more remains have been located at the family home in Spring Hill, FL.

At about 11:45 PM, a man reported two suspicious men running by his house, and the policemen investigated the area, finding two sets of footprints leading up the river.

After 11 hours of searching, a tired and disheveled Mansfield was arrested without incident at Paradise Park, hiding in some bushes and still wearing his prison uniform.

"[50] Not long after his sentencing, several inmates at the Hernando County Prison, among them spree killer Robert Dale Henderson, attempted to break out, but were thwarted by the authorities.