New details are emerging about Adam Lanza and how spent his time in the lead up to the mas­sacre that left 20 chil­dren and 7  adults dead.

A source with knowl­edge of the inves­ti­ga­tion tell CNN Lanza “was obsessed” with mass murderers.

One of those, according to CBS and The Hart­ford Courant, is Nor­we­gian mass-​​murder Anders Brievik, who killed 77 people in 2011.

Reporters for the Hart­ford Courant and CBS also say a trove of vio­lent video games were found in Lanza’s base­ment and that he played them all the time.

Out­Front tonight: Professor of Crim­i­nology at North­eastern Uni­ver­sity Jack Levin, and Har­vard Med­ical School Psy­chol­o­gist, William Pol­lack.

Read the article at CNN →