Forensic psychologists are looking into what may have motivated the Golden State Killer.
Police say Joseph James DeAngelo is behind 12 murders and at least 50 rapes throughout California in the 70s and 80s.
KRON4’s Hermela Aregawi spoke with an expert who specializes in sexually violent crimes.
Hear what he had to say:
DNA FROM ANCESTRY WEBSITES LED CRACKED GOLDEN STATE KILLER CASE
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