VERNON — The former chief of the Coventry Volunteer Association, previously charged with sexually assaulting a 15-year-old girl, was arrested again Friday on charges of attempting to tamper with a witness and attempting to violate a protective order.

Joseph Carilli was served with two arrest warrants during an appearance in Superior Court in Rockville. Those warrants were ordered sealed, but they alleged that he has continued to try to communicate with the victim. He had previously been charged with witness tampering in April.

Carilli , 53, faces charges of second-degree sexual assault and risk of injury to a minor for allegedly having sexual intercourse with a girl who was part of the South Coventry fire department's junior firefighter program. He was arrested on those charges in February.

The girl told police, according to the warrant for Carilli's arrest, that he impregnated her. She said that she had an abortion and that, for a while, Carilli helped her pay for it, but then stopped giving her money.

The April charges of witness tampering, violation of a protective order and second-degree harassment were for allegedly sending a letter to his alleged victim. The girl, now 17, received the letter at home and she and her family turned it over to authorities, police said.

Carilli told police the teen was blackmailing him and forcing him into the relationship by threatening to tell the rest of the department he had been convicted in the 1980s of sexually assaulting a minor, according to the warrant for his arrest. Police did not believe that claim because Carilli's criminal background was well-known in Coventry and in the fire department, according to the warrant.