Ann Marie Black, 42, of San Antonio, Texas, was fatally shot at a truck stop on the city’s Northeast Side on November 3, 2020. Security footage shows Gregory Morrison, 62, shooting Black multiple times after an argument; she was pronounced dead at the scene. Morrison was arrested the next day and charged with murder.

Reports in court later described that Morrison and Black had known one another for about a year and that Morrison had been sending Black threatening text messages and voicemails for several months before the killing. Black’s daughter, Kiersten Nelson, spoke publicly about seeking justice and criticized authorities for not taking previous complaints more seriously.

What details about their prior interactions or the security footage could help explain how the situation escalated to fatal violence?