These are the types of stories that completely sadden and frustrate me. Here is a young woman in such suffering that she decides that it is okay to laugh about killing a cyclist while driving drunk because her friend congratulates her for doing it. There is some kind of impairment, mentally or morally, that comes from that type of response.
Here is the MSNBC article and video about the incident.
Here is a very good thread on Reddit about the issue.
Here is a full length article about the incident and information about the victim in the Arizona Daily Star.
*Update: Just wanted to reference that I originally got the tip about this from the Bicycle Austin Email Discussion List. Credit where credit is due, I say!