Was "Jack the Ripper" An American? Grandson of H.H. Holmes Says So! TONIGHT, in addition to the usual wild news . . . Imagine being 40 years old and learning you are the direct descendant of America's first, and worst, serial killer. Jeff Mudgett, direct descendant of serial killer H. H. Holmes, joins Warren to explain the true story of the infamous killer and the evidence that proves Holmes was "Jack the Ripper."