Recent research from the University of Washington plus 2 other genetic papers all show similar de novo gene mutations present in people with autism.

From Yale, to Harvard and now the University of Washington, 3 different genetic papers are all showing these de novo gene mutations present in individuals with autism.

http://mobile.nytimes.com/article?a=934835&f=21

http://www.nature.com/nature/journal/vaop/ncurrent/full/nature10989.html