BANGOR, Maine (AP) — A Bangor man accused of killing his 49-year-old girlfriend told police they were involved in an altercation before she died.

A police affidavit indicates 50-year-old David Coon said the two were on the floor in a tussle when he covered her mouth to keep her from screaming. He says she was having breathing difficulties when he got up, so he dialed 911. Police described it as a domestic violence homicide.

The affidavit was made public as Coon appeared in court for a preliminary hearing Tuesday.

WZON-AM says autopsy results indicate Sherry Clifford died from asphyxiation and a neck injury. Coon continues to be held in jail. Defense lawyer Jeffrey Silverstein said it was too early in the case to comment on the murder charge.