Mary Mitchell, Loughner's paternal aunt, told the Arizona Star that she had not seen him in 15 years, but remembered him as "the sweetest thing that ever lived."
That he grew up to allegedly do such horrible things is a sign that mental health awareness is not where it needs to be in America, Mitchell said.
Special Section: Tragedy in Tucson
"We need to do something to help people with mental illness before something like this happens again, before there is a tragedy," Mitchell said, adding that she believed Loughner was mentally ill.
After expressing sympathy for the victims in Saturday's shooting, Mitchell said she felt sorry for her brother and sister-in-law, Loughner's parents.
"Randy and Amy need to be respected," Mitchell said. "They are victims, also. They have to live with this the rest of their lives."
Loughner's Ex: He's "Completely Different" Now
In a statement yesterday, Loughner's parents said: "There are no words that can possibly express how we feel. We don't understand why this happened. It may not make any difference, but we wish that we could change the heinous events of Saturday. We care very deeply about the victims and their families. We are so very sorry for their loss."
People have been dropping off cards and flowers at the home of Randy and Amy Loughner since the shooting.
One of them was nurse Lisa Campbell, who lives about three miles away and doesn't know the couple.
She brought by a card and flowers. Campbell said in the card were her name and phone number - in case they wanted someone to talk to.
Campbell said she wanted the Loughners to know they had the support of Tucsonians.