A longtime friend of Jared Lee Loughner, the suspect in custody following the murder of six people in an apparent assassination attempt on Arizona Rep. Gabrielle Giffords, said there was a mysterious, significant change in him a year before the shooting.
"He was a good person that just somehow changed so much," former classmate and friend Tong Shan told ABC News in an exclusive interview. "I don't know what the hell happened to him."
When she heard news reports of Loughner's arrest in connection with the deadly attack, she said, "I was shocked, but I believed it was him."
According to court documents released today, authorities discovered a safe in Loughner's home with a thank you letter from Giffords for attending a Congress on Your Corner event in 2007 -- the same kind of event Loughner allegedly assaulted Saturday. Another envelope said "I planned ahead," "My assassination" and "Giffords" and bore what appears to be Loughner's signature, the documents said.
Shan said she became friends with Loughner the day the two graduated from high school and also had class together at Pima Community College in 2007. She said the they would hang out often after class but lost touch after the semester ended until they reconnected in the summer of 2010 when, Shan said, Loughner acted radically different.
"I don't know what might have caused him to change, but from the way he was talking to me [online]... you can see. It was just questions and questions and random, weird questions that didn't go together," she said. "He wanted to know everything... He would just trip out.
"I don't know why it didn't jump out at me, like, 'Hey, something's wrong."
Shan last spoke to Loughner in October, after he was suspended and dropped out of school and before he purchased a semi-automatic handgun from a gunshop in Tucson. But she said while Loughner was "anti-government," he was never violent and never mentioned plans to buy a gun.
When he was suspended from Pima Community College, the school sent a letter to Loughner's parents stating that if Loughner wished to return to the school, he would have to "obtain a mental health clearance indicating, in the opinion of a mental health professional, his presence at the College does not present a danger to himself or others," the school said in a statement.
One Pima Community College student, who had a poetry class with Loughner later in his college career, said he would often act "wildly inappropriate."
"One day [Loughner] started making comments about terrorism and laughing about killing the baby," classmate Don Coorough told ABC News, referring to a discussion about abortions. "The rest of us were looking at him in shock ... I thought this young man was troubled."
Another classmate, Lydian Ali, recalled the incident as well.
"A girl had written a poem about an abortion. It was very emotional and she was teary eyed and he said something about strapping a bomb to the fetus and making a baby bomber," Ali said.