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Miguel Angel Malacara, 27, who has been in custody since February 2011, was immediately sentenced to credit for time served and was ordered to register as a sex offender for life.

In a hearing Friday before Judge Ana Espana, the defendant pleaded guilty to an unrelated domestic violence charge involving his girlfriend and was sentenced to a two-year state prison term, prosecutors said.

Prosecutors said police used DNA from the jeans of a woman bitten in the buttocks to tie Malacara to a string of groping assaults which began in September 2010.

The woman was bitten through her clothing, and investigators were able to extract enough DNA to match a sample provided by the defendant after he was sentenced on a drug trafficking conviction in December 2009, according to prosecutors.

Witness statements also connected Malacara to the gropings, police said.