A convicted criminal who volunteered as a music director is going back to prison after failing to register as a sex offender.

A judge sentenced Vincent Greco to two years and eight months in prison on Friday.

Greco volunteered for a jazz band that rehearsed at a Linda Vista school, but he did not inform the school about his criminal history.

Greco also failed to tell police about his contact with children or that he moved from Poway to El Cajon.