LIVERMORE — Ten criminal charges have been filed against a 45-year-old man arrested Nov. 22 after he allegedly pulled a gun on a group of juveniles engaged in informal boxing matches at a park, according to authorities and court records.

The suspect, Gregory Polson, of Livermore, was charged Tuesday with two felony counts of child abuse and felony counts of possession of a firearm by a narcotic addict and possession of an assault weapon. He was also charged with two misdemeanor counts of exhibiting a deadly weapon and single misdemeanor counts of possession of cocaine, possession of dangerous fireworks, possession of metal knuckles and possession of an injection/ingestion device.

He was initially being held in lieu of $190,000 bail. But at his arraignment Wednesday in Dublin, he was rele

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