 This was a result of a self-inflicted gunshot wound. It's a very sad day for our department. It also stresses the fact of the importance that we talk about every day when it comes to the mental health of our officers and the fact that they see and do things that normal people don't see and do. And that takes its toll. CMPD says the person who died was Officer Brent Simpson, an 18-year veteran of CMPD, most recently in the K-9 unit, and before that, an AD veteran.