Eric Clark was not guilty because his age, his education and his mental illness. Eric Clark was born in 1983. He is Terry Clark’s son. He was 17 years old when he killed the police. So it took three years for Eric Clark to be found competent to stand trial. His age is young. He not clearly what happen when he do something wrong. He don 't know serious result when he kill a person. He has mental illness. He called his mother and his father aliens. He 'd abandoned his car on a road. He called Flagstaff was a platinum city inhabited by 50,000 aliens. And he told his parents “The only thing that will stop aliens are bullets.” A mental illness is a condition that impacts a person 's thinking, feeling or mood and may affect his or her ability to