Pima County Sheriff Clarence Dupnik told CNN's Kiran Chetry that his department has documents and eyewitnesses that show Jared Lee Loughner was a very troubled individual.
Dupnik people who have troubled personalities are very susceptible to the kind of anger that may have led to the shooting. He spoke to CNN about the evidence they have in this case so far and why he believes Loughner "specifically targeted" U.S. Rep Gabrielle Giffords.
Watch American Morning weekdays 6am to 9am ET. For the latest from American Morning click here.