The first roll-in appearance of the 'Golden State Killer'

California investigators tracked down the man they suspect is the Golden State Killer by comparing crime scene DNA to information on genealogy websites consumers use to trace their ancestry, a prosecutor said on Thursday.

Former police officer Joseph James DeAngelo, 72, was arrested on Tuesday outside the Sacramento-area home where he has lived for at least two decades, not far from the site of the first of eight murders he is charged with committing 40 years ago.

DeAngelo, described by neighbors as an oddball and loner known to fly into occasional fits of solitary rage, is suspected of 12 slayings in all. He also is accused of committing 45 rapes and scores of home invasions in a crime spree that spanned 10 years and 10 California counties during the 1970s and 1980s.

Announcing his arrest on Wednesday, authorities said DeAngelo's name had never surfaced as a suspect prior to last week, when a DNA match was made.
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