PHILADELPHIA — A nor’easter was blanketing Philadelphia with snow when Samuel Goldberg’s call came in to the city’s 911 center at 6:30 p.m. on Jan. 26, 2011. “Help! I need an ambulance now. I just walked into my apartment. My fiancée is on the floor with blood everywhere,” he said. Goldberg, then a 28-year-old TV producer, had left his fiancée, first-grade teacher Ellen Greenberg, 27, in the Manayunk apartment they shared to go to the gym in their building around 4:45 p.m. When he returned about half an hour later, he found the swing bar lock to their apartment was engaged from the inside. Una…
