Arizona Shooting Suspect Jared Loughner "Planned Ahead," Say Letters

TUCSON, Ariz. (CBS/AP) Investigators in the Arizona shooting rampage that left six people dead and 14 others wounded, including Rep. Gabrielle Giffords, said they seized evidence suggesting suspect Jared Loughner planned ahead.

PICTURES: Arizona Shooting Victims

Investigators carried out a search warrant at Loughner's home and seized an envelope from a safe with messages such as "I planned ahead," "My assassination," and the name "Giffords" next to what appears to be the man's signature.

The FBI also found a letter in a safe from Giffords, on Congressional stationery, dated Aug. 30, 2007 that thanked Loughner for attending a "Congress on your Corner" event at the Foothills Mall in Tucson.

Loughner is charged with one count of attempted assassination of a member of Congress, two counts of killing an employee of the federal government and two counts of attempting to killing a federal employee.

Loughner remains in federal custody and is being transported to Phoenix where he will make an initial court appearance on Monday at 2 p.m. local time.

Loughner is accused of killing six people, including a federal judge, an aide to Giffords and a 9-year-old girl who was born on Sept. 11, 2001. Fourteen others were wounded, including the three-term Democrat lawmaker. Police don't know his motive, but said he targeted Giffords at a public gathering around 10 a.m. Saturday.

COMPLETE COVERAGE OF THE ARIZONA SHOOTING FROM CBS NEWS