Biting a cop, how progressive.

BOSTON (CBS/AP) — State Police say 51 people were arrested in Boston late Tuesday night during protests of a grand jury’s decision not to indict a white Ferguson, Missouri, officer who fatally shot an unarmed black teenager.

All but one were turned over to Boston police for booking Wednesday, most on disorderly conduct charges.

One state trooper was hurt when he was bitten on the wrist by a protester, according to police. He was treated at the scene.

An estimated 1,500 people marched from Dudley Square in the Roxbury down Massachusetts Avenue to the South Bay.