I included an article I actually included in my paper, because I found it interesting. It's about a young man, Billy Kuch, who was drunk and accidentally walked up to the wrong house and tried to walk in. The homeowner, told him to repeatedly leave, and when Billy asked for a lighter and stumbled forward, the homeowner shot him in the chest. Kuch ended up surviving, and the homeowner said he felt threatened when Kuch stumbled forward, that's why he shot him.
http://legalnews.findlaw.com/article/04kjcPz2nt9Gw