Videos Challenge Accounts of Convention Unrest

Dennis Kyne put up such a fight at a political protest last summer, the arresting officer recalled, it took four police officers to haul him down the steps of the New York Public Library and across Fifth Avenue.

“We picked him up and we carried him while he squirmed and screamed,” the officer, Matthew Wohl, testified in December. “I had one of his legs because he was kicking and refusing to walk on his own.”

Accused of inciting a riot and resisting arrest, Mr. Kyne was the first of the 1,806 people arrested in New York last summer during the Republican National Convention to take his case to a jury. But one day after Officer Wohl testified, and before the defense called a single witness, the prosecutor abruptly dropped all charges.