Jared Remy, the son of Red Sox broadcaster Jerry Remy, was arraigned Friday on charges of killing his girlfriend, Jennifer Martel.

Remy pleaded not guilty to charges of murder and domestic assault and battery.

Middlesex District Attorney Marian Ryan (right) spoke to the media about Remy's arrest.

Remy allegedly pinned Martel to the ground of the patio at their Waltham home and stabbed her to death.

On Tuesday night, Remy allegedly pushed Martel into a mirror in their home, and was arrested on assault and battery with a dangerous weapon charge. He was released on personal recognizance.

Martel had recently called her mother and said she was going to end her relationship with Remy, according to Martel's grandfather.

Remy held his daughter in a photo. The couple's daughter was in the house during the attack.

According to the docket at Waltham District Court, Martel obtained an emergency restraining order against Remy at 9:30 p.m. on Tuesday, which remained in effect until Wednesday when the courthouse opened. But she did not appear in the restraining order session of the court held on Wednesday, and the restraining order expired on Wednesday.

Remy has a history of violence. In 2006, he was ordered to serve one year at the Middlesex House of Correction in a domestic assault case, a sentence that was suspended.