Killers Without Conscience
S1, E2: The phenomenon of serial killing moved to America late in the 19th century with two of the country's most brutal killers: Chicago's Dr. Death, H.H. Holmes, and a Boston nurse, Jane Toppan.

S1, E2: The phenomenon of serial killing moved to America late in the 19th century with two of the country's most brutal killers: Chicago's Dr. Death, H.H. Holmes, and a Boston nurse, Jane Toppan.