When most lawyers debate the death penalty, they do it in a court room. Robert Blecker may be the only lawyer who goes into prisons and debates the death penalty with the residents of death row. As one of the few academics who makes a passionate argument in favor of capitol punishment, he’s spent the last 20 years speaking to those who face the ultimate punishment — and recording his visits on videotape. His relationship with one of those inmates, Daryl Holton, who admitted to killing his four children in 1997, is the subject of a new documentary, Robert Blecker Wants Me Dead. It just opened here in New York.