CONCORD, N.H.—A man who pleaded guilty as a teenager to the 2001 stabbing deaths of two married Dartmouth College professors is challenging his life-without-parole sentence, saying that the New Hampshire Constitution prohibits it.
Robert Tulloch was 17 when he killed Half Zantop and Susanne Zantop in Hanover as part of a conspiracy he and his best friend concocted to rob and kill people before fleeing to Australia with their ill-gotten gains.
