Police have charged a 21-year-old California man with doing most of the damage that was done during the two-day G-20 summit in Pittsburgh.

Pittsburgh Police Chief Nate Harper tonight said David Japenga was taken into custody shortly after 11 p.m. Thursday after police witnessed him breaking businesses' windows during a protest along Forbes Avenue in Oakland.

Chief Harper said Mr. Japenga, who at first refused to give his name, then gave the false name of Eric Blair, broke more than 20 storefront windows and glass doors, including $20,000 worth of windows at Citizens Bank on Craig Street in Oakland. He was single-handedly responsible, Chief Harper said, for most of the $50,000 in damage done during summit protests.

Mr. Japenga was charged with felony criminal mischief, instruments of a crime, and providing false identification. Chief Harper said Mr. Japenga was not living in Pittsburgh and had come into the city for the summit.

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