The death of a grandmother in Brunswick is now being treated as a homicide, and her son is one of the suspects.

At first, police only said Mary Tench's death was "suspicious." But now the autopsy results show she died of blunt force trauma to her head.

Monday night Tench left work in Lakewood but never arrived home on Camden Lane in Brunswick. Her son James called police to report her missing.

It wasn't long before someone saw Mary's Ford Escape pulled off the road on Carquest Drive, just outside her neighborhood.

Mary was found inside with blunt force trauma wounds to her head.

Twenty-seven-year-old James Tench is being questioned by Brunswick police and is actually in the custody of the Strongsville police. He was turned over on an unrelated criminal investigation.

Police wouldn't comment on the ongoing investigation.

Mary Tench's daughter, Jennifer, declined an on-camera interview because she was planning her mother's funeral. But she told us her priority is to find out who did this to her mother and to keep the rest of her family safe.