I was running around the firehouse in cherno when I came across someone that looked hostile. He started to shoot at me from inside the firehouse with a mosin, and I ran around the side of the fire house and waited for him. He turned the corner, and I shot him in the chest and he shot me in the leg. He died or went unconcious. After I bandaged myself up I crawled over to where he fell over and there was no body. I assume the body disappeared instantly.