On a stormy night in 1962, Stephen Patrick Sweeney, a serial killer, was one of the last inmates to be executed in the electric chair at Sing-Sing Prison in Ossining New York. At almost the same instant that the current passed through Sweeney's body two births were recorded in the same town. One newborn, a female, was delivered by midwife in the home of Iris and George Cooper, the other, a male was attended to by an obstetrician at the local hospital...