The complaint that DeKalb police responded to turned out to be 28 year old Cameron Lupton stabbing his father and stepmother repeatedly at their home. A police officer then shot and killed Cameron.
Juan Vega, who lives a few houses away from the Luptons, says the incident is a shock to him.
"This neighborhood is pretty quiet" says Vega. "I’ve never seen anything like that around here."
Facebook pictures show Lupton when he served in the Army. He was discharged about two years ago. Friends and neighbors say he suffered from bi-polar disorder and schizophrenia. Kenneth Brady spoke with Lupton about a week ago and says they discussed their bi-polar disorders.
“I’m bi-polar myself and he said he is worse than I am... I said I don't know man" says Brady. "That was the last time I seen him he went back across the street. Everything was fine at that point.”
Andrew Klatt, one of Lupton’s friends from high school, says Lupton also had a temper.
"You could just see it in his face and his eyes that he was just aggravated and it just wasn't sitting right with him."
Dr. James Thomson, a Psychologist who deals with patients suffering from Post Traumatic Stress Disorder, says veterans should be encouraged to talk about their stress.
"It can come crashing in on you at any point" says Thomson. "Especially the returning veterans to get the help that they need."
DeKalb Chief of Police Gene Lowery says while this is an ongoing investigation that left one man dead, he says two other innocent lives were saved by his officer's actions.