A fourth person has been charged in connection with the Dec. 5 kidnapping of an 18-year-old Rockland woman.

Amanda Dyer, 21, of Rockland turned herself in to the Rockland Police Department on Feb. 9 after a warrant was issued charging her with assault, according to Rockland Police Detective Russell Thompson.

Dyer was released on bail.

Thompson said one more arrest is expected.

Jessica E. Gagnon, 27, of Thomaston was arrested Jan. 27 on charges of kidnapping, assault and terrorizing.

Felicity Hall Butler, 31, of Rockland was arrested Feb. 3 and charged with conspiracy kidnapping and assault. She has since been released on bail.

Zachary Clarke, 26, of Rockland was arrested Feb. 3 at night and charged with kidnapping.

Gagnon, Butler and Clarke are accused of kidnapping Brittney Harvey on Dec. 5, according to police.

According to witnesses interviewed by police, Harvey received a phone call Dec. 5 from Dyer inviting her over to Dyer’s apartment at 49 Brewster St. for drinks. Harvey’s boyfriend David Bates Jr. told police that he had warned her not to go, and that he was suspicious because Dyer was friends with Gagnon, who had threatened Harvey in the past, according to the affidavit. Dyer offered to pay Harvey’s cab fare for the ride over.

Shortly after Harvey and her boyfriend arrived at the apartment, Gagnon and Butler came out of a bathroom and attacked Harvey. Witnesses state in the affidavit that Gagnon had Harvey by the hair and the two women physically dragged her out of the apartment. They are accused of punching her in the face while she was on the ground. Harvey was dragged across the street to the Movie Gallery parking lot and then forced into a car and taken somewhere else.

They then took her to an apartment in Thomaston where police rescued her.