While boats were racing from Key West to Mariel harbor to pick up Cubans who wanted to leave the island, a former county police officer, Mark Meier, took the witness stand in Tampa to say that motorcyclist Arthur McDuffie yelled, “I give up!” before a bunch of cops started pummeling him with nightsticks and Kel-Lites. Just judging from the headline, Miamians thought they had a clear idea of what had happened. They didn’t.