On April 3, 2015, in Houston, Texas, Carl Williams, 23, and his father, Glen Williams, 54, were fatally shot at the Crystal Springs apartment complex in the 5900 block of Selinsky at Sesame. Earlier that morning, around 4 a.m., Glen Williams had an argument with a woman at the Corner Food Mart nearby. A man intervened in that dispute; surveillance images from the store show the man brandishing a weapon and pointing it inside the store.

Carl arrived to pick up his father and they returned to their apartment. Family members say the assailant followed them home. During the attack both men tried to flee the vehicle; one collapsed near the apartment door and the other died about 30 yards away. Authorities later arrested 38-year-old Christopher Mallett and charged him with capital murder, alleging both deaths were caused intentionally during the same criminal transaction. The motive is not detailed.

Did anyone in the area know Carl or Glen Williams, or see activity near the Crystal Springs complex that morning?