SAN MATEO (KCBS) – Facebook posts and tweets helped police nab a drunk who propositioned teenage girls on their way to school, San Mateo police said Thursday.

The investigation began when a 15-year-old girl reported that a drunk man had tried to solicit sex from her on North Claremont Street the morning of February 18.

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Detective Sergeant Ryan Monaghan said police located surveillance video of the man, then distributed images of him on Facebook, Twitter and Nixle, a network used by many law enforcement agencies.

“When we sent out the photo, we had two additional 12-year-old victims that happened to see the suspect’s photo posted on the Facebook,” he said.

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Monaghan said police who canvassed the neighborhood quickly learned the suspect’s name.

When Roberto “Guadalupe” Micalax found out police were looking for him, the 41-year-old turned himself in. He was booked on suspicion of child annoyance, solicitation of sex in public and assault with the intent to commit a sex crime.

Monaghan said the case shows how, in the age of social media, “all points bulletin” takes on a whole new meaning, a big change from the days of posting flyers on poles.

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“Literally with a keystroke we can send out information,” he said, reaching “roughly 22,000 people using all these different social media venues.”