A material witness has been arrested related to the death of 20-year-old Lea Ponce.

Authorities have arrested 35-year-old Douglas Foster of Marion after finding his truck parked behind a storage unit in Marion, according to the Muscatine County Attorney. Ponce was last seen at 12:32 a.m. Tuesday, getting into a white GMC pickup truck authorities believe to belong to him. At 12:58 a.m., Ponce’s body was found dead along Highway 38, just north of the intersection of County Road F70.

When investigators found Foster he was hiding in an attic along with some of Ponce’s belongings. In a police interview, Foster claims to have picked up Ponce at a Walmart but then let her out of the truck a few minutes later. Foster is also wanted on a felony warrant out of Texas. He was taken to the Muscatine County Jail. Bond has been at $50,000.