It's about winning.

In Seattle, guns, reloading ammo, competition shooting, and making videos of said competitions serve as evidence to support the accusation a person is a murderer. I don't kwon if the suspect did it or not but God forbid you build your case on the actual murder weapon and a motive. Also the prosecutors released the video to the press. Nothing like trying the case in the media or tainting the jury pool. Well, it's never been about justice, only winning.

H/T to Robb.