Perhaps you missed Dr. George Woods affidavit about Damien Echol's mental health. Dr. Woods states that Damien is bipolar, schizophrenic, and has a history of substance abuse.
From Dr. Wood's affidavit:
Mr. Echols has been evaluated on
three separate occasions by
three different psychologists, each of whom administered a battery of tests. A prominent feature of each evaluation was the Minnesota Multiphasic Personality Inventory (MMPI), which was administered on June 8, 1992; September 2, 1992; and February 20, 1994.
The independent test results were quite consistent; all revealed valid profiles and strong indications of depression, mania, severe anxiety, delusions and psychosis.
Test results for the June 8, 1992, MMPI reflected elevations on scores of psychotic thinking, including hallucinations, paranoid ideation, and delusions, as well as severe anxiety and other related emotional disturbances.
The suggested diagnoses were schizophrenia, disorganized type; and bipolar disorder, manic. Individual responses on this test revealed that Mr. Echols was afraid of losing his mind, had bizarre thoughts, and had very peculiar experiences. Three months later, on September 2, 1992, a second MMPI was administered. The test results very closely paralleled the findings of the earlier MMPI. Shortly before Mr. Echols’ trial began in 1994, he was administered the MMPI a third time for the purpose of identifying mitigating evidence. Like the other two, this MMPI revealed psychotic thought processes consistent with
schizophrenia. Specific indicators of a thought disorder included mental confusion, persecutory ideas, acute anxiety, and depressed suicidal ideation.
I have also consulted with Karen B. Froming, Ph.D., a board certified neuropsychologist who administered a battery of neuropsychological tests to Mr. Echols to determine whether Mr. Echols suffers from brain damage or deficits that would affect his medical or psychological status.
The results of this battery - which are consistent with all three MMPI’s - suggest that Mr. Echols suffers from a severe long term mood disorder (Manic Depression) that affects his perception, judgment and behavior.
http://callahan.8k.com/wm3/gwoods.html
Here are the violence statistics for which you were looking:
The MacArthur Violence Risk Assessment Study found that 18% of people with a psychiatric disorder committed at least one act of violence in a year. It found that
31% of people who had both a substance abuse disorder and a psychiatric disorder committed at least one act of violence in a year.
(An additional study found this)
Rates of violence in schizophrenics compared:
5.1% in control group without a mental health disorder
8.5% in schizophrenics without a substance abuse disorder
27.6% in schizophrenics with a substance abuse disorder
Percentage of people convicted of at least one violent crime, 1973–2006
Source: Fazel S, et al. Journal of the American Medical Association. May 20, 2009.
Rates of violence in people with bipolar disorder compared:
3.4% in control group without a mental health disorder
4.9% in bipolar individuals without a substance abuse disorder
21.3% in bipolar individuals with a substance abuse disorder
Percentage of people convicted of at least one violent crime, 1973–2004
Source: Fazel S, et al. Archives of General Psychiatry. September 2010.
http://www.health.harvard.edu/newsle...s-and-violence
Damien admitted that he abused numerous substances.