Joseph Daniel Malloy, 32, was shot and killed on June 30, 2017, during an argument at the couple’s home on County Road 192 and County Road 865 in Liverpool, Texas. The Brazoria County Sheriff’s Office reports the dispute was with his girlfriend, Linda Lizette Lerma, 29, who allegedly pulled a gun and shot Malloy once, killing him.

Lerma was arrested and charged with first-degree murder and held in the Brazoria County jail on $250,000 bond. Authorities said the argument escalated to the point that the firearm was used; prosecutors later pursued a first-degree murder charge.

What details about the moments leading up to the shooting or witnesses at the scene might still help explain how this argument turned deadly?