Todd Christopher Kohlhepp, is a South Carolina man who investigators claim is a serial killer. On Monday evening, he was charged with three more counts of murder. This brings the total to seven.

Kohlhepp, 45, was arrested early this month when Spartanburg County sheriff’s deputies who were investigating a sex crime tip, heard banging sounds coming from a metal container on his property.

They found Kala Brown, 30, who had been missing since August, along with her boyfriend, Charlie Carver.

Brown told investigators that she saw Kohlhepp shoot and kill Carver. They found his body in a shallow grave. Kohlhepp then led investigators to the grave sites of Meagan Coxie, 25, and Johnny Coxie, 29, authorities said.

Kohlhepp was ordered held without bond Monday night. He was already being held without bond on four other counts of murder from a 2003 quadruple homicide near the town of Chesnee, which Sheriff Chuck Wright has said he has confessed to.

The Associated Press reported that the new arrest warrants say Kohlhepp shot Meagan Coxie last Christmas or Dec. 26 after holding her against her will. He killed Johnny Coxie the week before, according to the warrants.