Hi guys! I'm a current SLU student, I don't post much but I did want to clear this up. This is my 5th year in stl and a shooting at the metro is not typical of stl. I wouldn't take it alone past dark, but I'm always comfortable on it otherwise. A lot of workers, especially health workers, take it to and from work. And just to be clear the teen at the metro stop was shot in the leg, so definitely wasn't carried out in a body bag. Maybe on stretcher. Here's the link if you don't believe me.
http://fox2now.com/2015/09/20/teen-shot-at-delmar-metrolink-station/
stl is a safe city as long as you're a person using common sense. Don't walk in dark areas that you don't know. Don't walk alone. I have always felt safe in stl and I don't think the supposed unsafeness of stl has changed my behavior in any way.