Who Would Carry Out A School Shooting?

09:07

December 17, 2012

This undated photo shows Adam Lanza posing for a group photo of the technology club which appeared in the Newtown High School yearbook. Authorities have identified Lanza as the gunman who killed his mother at their home and then opened fire on Friday inside an elementary school in Newtown, Conn., killing 26 people, including 20 children, before killing himself. (AP Photo)

What makes a person grab a gun - or several guns - and walk into an elementary school ready to kill?

Many people are asking that question following the mass shooting at an elementary school in Newtown, Conn. that left 20 young children and six teachers and staff dead.

Blog: "I am Adam Lanza’s mother"
H&N's full coverage of the Newtown shootings

Guest:

Dr. Ken Duckworth, child psychiatrist and medical director at the National Alliance on Mental Illness.

This segment aired on December 17, 2012.