TUCSON, Ariz. (AP) -- The deeper officers get into the investigation of the Tucson, Ariz., shootings, the more they hear about "two" Jared Loughners.
Officers interviewing people who knew the suspect are learning about the younger Jared, a normal, happy kid -- and also about the older deeply disturbed Jared.
Sheriff's Capt. Chris Nanos says that at some point there was "something in this kid" that "someone could say, 'That's my son, I love him."'
Documents released earlier show Loughner was judged mentally unhinged and suspended from an Arizona community college.
Authorities also have revealed that Loughner also was carrying a knife on Saturday, but didn't use it.
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Meanwhile, a man walking his dog has found a black bag holding ammunition that authorities believe was discarded by a gunman accused of trying to assassinate an Arizona congresswoman.
Chief Rick Kastigar with the Pima County Sheriff's Office told The Associated Press that an 18-year-old found the bag Thursday morning in a neighborhood near where the suspect lives. He went to get another man, who looked inside and saw ammunition.
Authorities have said the suspect, Jared Loughner, and his father got into a confrontation over the bag at their home in the hours before the shooting.