Catherine Holmes, 61, was fatally shot in the parking lot of the Michigan State University Federal Credit Union in Okemos, Michigan, on October 20, 2006. The shooting occurred after an argument; witnesses reported hearing the dispute and then gunshots while Catherine was seated in her car. Her husband, Donald Holmes, then 64, left the scene and became the sole suspect as investigators learned the couple had been having domestic troubles, including disputes over finances.

Donald, a former MSU police officer and a program presenter in MSU’s Civil and Environmental Engineering Department, remained at large for four days before surrendering to the Ingham County Sheriff’s Department after a public plea from his son. He was charged with first-degree murder and later pleaded guilty to a reduced charge of second-degree murder, admitting he had come to speak with his wife and acknowledging dishonesty about their joint finances while saying he did not remember firing the shots. He was sentenced to 25 years in prison for Catherine’s killing.

If anyone knew Catherine or saw activity at the credit union parking lot that day, does any detail still stand out?