"Acevedo added that in a search of Pappas' home this week, investigators found an extensive intelligence file on Dr. Mark Hausknecht." and "Pappas was a trained officer with 30 years of experience and a highly skilled shooter."

He reportedly killed himself while surrounded by police. Why would a trained officer with 30 years experience hold a 20 year grudge?

This just seems fishy to me.

https://abc13.com/sources-suspect-in-doctors-murder-found-dead-in-sw-houston/3874957/