I'm writing this for a dear friend. Several years ago she had been drinking and was in a tragic accident which took the life of the driver of another car. Between the accident and her trial, instead of avoiding alcohol, she did what I call "doubling down." Partying every night, drinking to excess and generally behaving badly. After listening to her describe the situation, and being somewhat familiar with PTSD, I believe it was her way of dealing with the tragedy. Is anyone familiar with PTSD when a person realizes they are the cause of another person's death. I'm looking for research leads. Thank you everyone in advance.