Spokeswoman : The Department of Homeland Security (DHS) is working with the U.S. Attorney's Office for the Eastern District of Virginia to investigate a possible threat against our nation's critical infrastructure. Genetics experts say no single gene or mutation will emerge to explain Adam Lanza 's acts . Lanza murdered 26 people , including 20 children , at Sandy Hook school on December 14 .
Spokeswoman : University of Connecticut Health Center geneticists are studying the DNA . Genetics experts say no single gene or mutation will emerge to explain Adam Lanza 's acts . Lanza murdered 26 people , including 20 children , at Sandy Hook school on December 14 .