Tulsa police say Allyssa Fielding has died. 

The victim was severely injured after her boyfriend, Colby Wilson, beat her so badly it killed her unborn child, police say. 

Related Story: Tulsa Police: Man Beat Girlfriend, Killed Unborn Child 

This happened Monday, when police responded to the Sawmill Apartments after a woman reported her son, Colby Wilson, had called her threatening to commit suicide.

However, when officers arrived, "We found a victim receiving CPR from the suspect's mother. She didn't have a heartbeat, and her unborn 6-month-along baby did not have a heartbeat," according to Tulsa Police Sergeant Shane Tuell.

Tulsa police say Wilson will now face a first degree murder charge.