FORT BEND COUNTY, Texas -

Investigators have recovered a weapon connected to the murders of Michael and Lynda Walton.

Authorities say they found a .22-caliber rifle after obtaining a search warrant for Ryan Walton's mother's car.

Walton took his mother's BMW on Thursday and was seen driving it Saturday in the Rosenberg area before his arrest.

The Fort Bend County Sheriff's Office said on Monday that Walton has confessed to shooting his parents.