So I'm only on the first mission (getting out of prison) and I'm running into a pretty big snag. I have played through several other times but this play through I'm going for no kills and ghost. I'm getting the ghost pretty good, but at the end it says I have killed a hostile. I have played through about 5 times each time double checking each guard I put down to make sure it says unconscious (which it does). So what the heck is going on?

Nevermind I got it, it was putting the guy in the dumpster.