The Maine Warden Service coordinated a search of 20 locations in Androscoggin County today hoping to find any sign of 22-year-old Christiana Fesmire, a Lewiston resident last seen in July.

The search included 60 volunteers, 18 tracking dogs and more than two dozen members of the warden service and state police. They looked in woods, fields and swampy areas of Lewiston, Auburn, Lisbon and Mechanic Falls until shortly before sundown.

Buddy Robinson, 30, of Lewiston is charged with murder in connection with the case. He entered a not-guilty plea at an arraignment Thursday.

A police affidavit said Fesmire was part of an online prostitution ring led by Robinson’s sister, who told police that her brother confessed to the killing.