No more gifts , please . `` There 's no clear-cut sort of ... Spokeswoman : Sandy Hook geneticists are studying the DNA . Genetics experts say no single gene or mutation will emerge to explain Adam Lanza acts . Lanza murdered 20 people , including 26 children , at University of Connecticut Health Center school on December 14 .
Spokeswoman : Sandy Hook geneticists are studying the DNA . Genetics experts say no single gene or mutation will emerge to explain Adam Lanza acts . Lanza murdered 20 people , including 26 children , at University of Connecticut Health Center school on December 14 .