The study does not identify what the specific genetic cause of schizophrenia is, but its authors say their results do help to explain why the mental illness remains prevalent.

BBC: 'Older fathers' link to schizophrenia

Tripi believes Ortiz confessed, in part, because he suffers from a mental illness - he is reportedly being treated for schizophrenia in prison - and didn't comprehend what he was signing at the time.

WSJ: Officials question 2004 Buffalo murder conviction