A couple suspected of leaving the woman's elderly mother lying in dog food and covered with ants inside a trailer without electricity remained jailed Friday.

Lisbeth Seeley, 56, and her common-law husband David Pilgrim, 47, were charged with injury to the elderly, said Montgomery police Sgt. Stewart Hightower.

Both were being held without bail Friday, Montgomery County Jail officials said. Police found Seeley's mother, 86-year-old Reba McNiel, inside the couple's 25-foot recreational vehicle March 30, Hightower said.

An anonymous caller alerted authorities after noticing a suspicious looking RV parked at a shopping center parking lot. McNiel was being treated for malnutrition and dehydration at a hospital, Hightower said.