"this i would believe more than what i would read on wikipedia"
I wouldn't:
"Second, there is considerable uncertainty whether schizophrenia without
substance abuse comorbidity is actually associated with violence. Large
prospective and case-control studies have found no or only a weak association."
http://jama.jamanetwork.com/article.aspx?articleid=183929
Individuals with severe mental illness including schizophrenia are at a
significantly greater risk of being victims of both violent and non-violent
crime. On the other hand, schizophrenia has sometimes been associated with a
higher rate of violent acts, although this is primarily due to higher rates of
drug use. Rates of homicide linked to psychosis are similar to those linked to
substance misuse, and parallel the overall rate in a region. What role schizo-
phrenia has on violence independent of drug misuse is controversial, but certain
aspects of individual histories or mental states may be factors.
Media coverage relating to schizophrenia tends to revolve around rare but
unusual acts of violence. Furthermore, in a large, representative sample from a
1999 study, 12.8% of Americans believed that individuals with schizophrenia were
"very likely" to do something violent against others, and 48.1% said that they
were "somewhat likely" to. Over 74% said that people with schizophrenia were
either "not very able" or "not able at all" to make decisions concerning their
treatment, and 70.2% said the same of money management decisions. The perception
of individuals with psychosis as violent has more than doubled in prevalence
since the 1950s, according to one meta-analysis.
http://en.wikipedia.org/wiki/Schizophrenia#Violence
Footnote 132
http://www.plosmedicine.org/article/info%3Adoi%2F10.1371%2Fjournal.pmed.1000120