A body believed to be that of a missing truck driver has been found in a northwest Iowa field not far from where his abandoned rig was discovered on an isolated highway just before Thanksgiving , but details of his death remain a mystery.

The Iowa Department of Public Safety said someone in his field discovered a body Wednesday, near where 53-year-old David Schultz’s semi was found parked in the middle of the road on Nov. 21.

The DPS didn’t identify the body as that of Schultz and said in a news release that a forensic autopsy was planned. But Schultz’s wife, Sarah, told reporters on Thursday that the person found was wearing boots that matched her husband’s, and his keys were found in the pants pocket.

The discovery, she said, brought a mixture of relief and sorrow.

“I’m glad we know where he is now,” Sarah Schultz said. “There’s still a lot of questions. Things don’t make sense.”