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Vincent Greco's past charges include lewd or lascivious acts with children under 18 and 14. His arrest in February of 2009 sent shockwaves throughout the San Diego Unified School District. The information that surfaced stunned teachers, staff and parents.

"They have to screen everybody, especially if they're going to work in school," one parent told 10News during an interview in 2009. "Not even teachers ... I don't know who to trust anymore."

Greco had been brought on by staff at the San Diego School of Creative and Performing Arts as a music volunteer, but he never disclosed he was a convicted child molester.

His hiring occurred after he finished serving a 32-month prison sentence for violating the conditions of his parole, which stated he could not have any contact with children.

A year later, Greco cut off his GPS monitoring device and fled to Nevada.

"Usually people choose to go underground because they want to live the life they want to live which often includes criminal activity and victimizing children," said Phyliss Shess, who is with the San Diego Sex Offender Management Council.

Agents eventually arrested Greco and brought him back to San Diego.

Two months ago, Greco did it again. Greco took off from an independent/sober living home in National City, left his GPS monitoring device behind and hopped on a train bound for Los Angeles, but he did not get far. Sheriff's deputies pulled Greco off the train and arrested him.

Now, two months later, Greco is back on the streets.

The California Department of Corrections and Rehabilitation Tuesday told 10News Greco checked in with his parole agent two hours after his Monday morning release and was re-fitted with a GPS monitoring device.

CDCR officials said Greco successfully served 67 of his 135-day sentence for his violation and is now being closely monitored 24 hours a day, 7 days a week.

10News also spoke with the District Attorney's Office to find out why Greco was released so soon. As of Tuesday, the office has not provided 10News with an answer.