Dr. Katherine Shear in the NY Times’ Well Blog

February 15, 2015
Blurb
 “The more awful the circumstances surrounding the death, the greater the risk of complicated grief,” Dr. Shear, Marion E. Kenworthy Professor of Psychiatry, said in an interview. Thus, survivors of those who died in the horrific car-train crash in Valhalla, N.Y., on Feb. 3, like the parents of children who died in the Sandy Hook Elementary School shooting in December 2012, are more likely to experience complicated grief than, say, I was following the expected death of my husband from cancer five years ago. 
http://well.blogs.nytimes.com/2015/02/16/when-grief-wont-relent/?ref=health