Mental health treatment, for both cops and soldiers, should be mandatory. If we are going to give them the power of life and death over another human being, they should have as much support as possible.

Personally, I think all police should be required to attend a mental health session at least once a month (even more, if they choose to). What happens in that session is entirely down to them. Hell, set up some games consoles, a TV and a small library. If they want to turn up and just read a book for an hour, that's fine! However, they should be required to be in the room, with a trained professional.

This would go a long way towards helping them. They can vent off, get some constructive tips, chill out, or fully engage. All would help. It also helps nip things like PTSD in the bud. Shooting a teen, because they drew a gun on you, and watching them die, is still watching a teen die by your hand.

In a perfect world, it would be a good exit path for retiring officers. Train them up, and they also know what it's like to be in their shoes.