Michelle Parker Missing: Hundreds search for Fla. mother who disappeared nearly a year ago, report says

(CBS) - About 150 people gathered on Sunday to search for Michelle Parker,  the missing Florida mother who disappeared nearly a year ago, the Orlando Sentinel reports.

PICTURES: Search for Fla. mother continues one year later

Volunteers waded through the dense woods around the Lake Nona area in Orlando, Fla. looking for Parker, 33, who was last seen on Nov. 17, 2011 when she dropped off her twin children at their father's townhouse.

Dale Smith, 41, was reportedly the last person who's seen Parker alive when she dropped off her children. He was named the prime suspect in the case, but no charges have been filed.

Brad Parker, Michelle's father, said some bones were uncovered during Sunday's search, the Sentinel reported. But he said it was undetermined whether they were human or animal bones.

Brad Parker said they may hold another search on Nov. 17, the anniversary of the day Michelle went missing. He said additional details are still pending.

Parker is described as a white woman, about 5 feet 6 inches tall with short dark brown hair. Anyone with information about Parker's whereabouts is urged to call the Orlando Police Department at 321-235-5300.

Complete coverage of Michelle Parker on Crimesider