Some friends of Jared Loughner have suggested the Tucson, Ariz. shooting suspect may have thought Saturday's attack was nothing more than a dream.
They said Loughner had been deeply interested in a practice known as "lucid dreaming" in which people try to control their own dreams. However, sometimes their dream life becomes more vivid than real life.
"Lucid dreaming is when a person has not only very vivid dreams, very clear dreams, but they are consciously aware that they are dreaming, and they are able to influence the dreams," Dr. Gary Schwartz, a professor of psychology and neurology at the University of Arizona, told ABC News.
One of Loughner's friends told Mother Jones Magazine that the 22-year-old even kept a dream journal.
"That's the golden piece of evidence," Bryce Tierney told the magazine. "You want to know what goes on in Jared Loughner's mind, there's a dream journal that will tell you everything."
Loughner reportedly had a difficult relationship with his parents. Neighbors said his mother and father were deeply affected by the alleged attack involving their son.
"Not only is he sad for his son, he's devastated for the people involved," Wayne Smith, a neighbor of the Loughner family, said.
On Tuesday, the suspect's parents apologized for their son's actions and offered condolences to the grieving families.
"There are no words that can possibly express how we feel," they wrote in a statement that was released to reporters. "We don't understand why this has happened. We care very deeply about the victims and their families."