Hundreds interviewed about Tucson rampage

TUCSON, Jan. 18 (UPI) -- Sources close to the Tucson shooting investigation say it could take weeks to fully determine the state of mind of rampage suspect Jared Lee Loughner.

The law enforcement sources told The Washington Post so far investigators have had little success in obtaining necessary information from either Loughner or his parents.

A team of 250 federal investigators and 130 local detectives has conducted more than 300 interviews with family, friends and neighbors since the shooting yet has been unable to determine what prompted the killing spree.

Investigators are querying associates and witnesses for details that could help them fill out a portrait of Loughner, accused of spraying with gunfire a political meet-and-greet in the parking lot of a Tucson grocery store Jan. 8, killing six people, including a federal judge, and injuring 13 others, including Rep. Gabrielle Giffords, D-Ariz., who was shot in the head.

They have retraced his steps in the days and weeks before the shooting and collected details of his life going back to high school.

One source described the task as completing a "jigsaw puzzle."

"We're talking to everyone he ever came in contact with," said a senior federal official who spoke on condition of anonymity.