NPR's Robert Siegel talks with Anthony DeStefano, Brooklyn courts reporter for Newsday about Lemrick Nelson. Nelson is on trial for violating the civil rights of Yankel Rosenbaum by stabbing him to death during what's known as the Crown Heights Riot of 1991. Nelson had previously been acquitted of murder in a state trial. His lawyers had argued he didn't stab Rosenbaum in his first federal trial, in which his conviction was overturned on a technicality. In the opening arguments for the retrial Monday, his lawyer said he did stab Rosenbaum.