Murphy said relatives had reported the girl missing to authorities.
At least two relatives arrived at the motel at the same time the suspect, Norman S. Barnes, returned to the motel. A relative of the victim summoned a state trooper working a paid detail on the Neponset River Bridge reconstruction project. The trooper arrested Barnes and helped rescue the girl.
“When the relative pulled up near the motel,’’ Murphy said, “the defendant returned to the inn, asking her what was she doing out of the room. … She began to run away.”
The burly Barnes appeared in court with his jacket pulled over his face and his hands handcuffed in front of him. He pleaded not guilty to charges of kidnapping and enticing a minor into prostitution.
During the brief arraignment, a man sitting in the rear of the courtroom shouted an epithet at Barnes, who shouted back a curse. The man was escorted out of the courtroom and left the courthouse.
At the request of prosecutors, Judge John A. Canavan III ordered Barnes held without bail pending a dangerousness hearing May 27.
His defense attorney, Joanna Sandman, did not challenge the move by prosecutors.
At the request of prosecutors, Canavan also ordered the case file impounded.
Murphy said in court that the teenager was taken to the Comfort Inn in Danvers, the Ramada Inn in Dorchester, as well as the Best Western in Quincy. She said Barnes would rent a room and then arrange for customers to come to the room where the girl was forced to have sex with them.
She also said Barnes forced the girl to have sex with him and that she was able to identify him to authorities by scars he has on his body.
Murphy said the investigation is ongoing and may lead to information showing the child was also forced to prostitute herself in other communities and other motels in the state.