Twenty-four-year-old Daniel Penny, a former U.S. Marine who killed a homeless man by putting him in a chokehold on the New York City subway, was taken into custody at a police precinct Friday and was arraigned on a second-degree manslaughter charge. “We were overjoyed to learn yesterday that… the arrest would happen today. And I would say: keep going. Keep going,” said Lennon Edwards, attorney for the Neely family.