SPARTANBURG -- Authorities say a 55-year-old man has been sentenced to 24 years in prison for killing his girlfriend with an ice pick, then burning and burying her body.

Prosecutor Trey Gowdy says Larry Casey of Cowpens pleaded guilty Tuesday to voluntary manslaughter. He admitted killing 20-year-old Kimberly Murphy in September 2007 and attempting to hide her body. Authorities say Casey walked into the Spartanburg County Sheriff's Office nine days later to confess to the killing.