Philadelphia is known for its firsts- first Library, first zoo- but the City was also home to more nefarious firsts. America’s first bank robbery, its first kidnapping for ransom, and its first octo-murder.  Stories include serial killer H.H. Holmes, and the real-life killers who inspired HBO’s Boardwalk Empire. Mix in murderous maids, bumbling burglars, and unflinching local heroes and you have True Crime Philadelphia.