William 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. He was convicted of the latter homicide, and later pleaded guilty to the previous murders to avoid the death penalty in Florida, receiving four life sentences.