Hadden Irving Clark (born July 31, 1952) is an American veteran murderer and suspected serial killer, currently serving two 30-year sentences at Eastern Correctional Institution in Westover, Maryland for the murders of 6-year-old Michelle Dorr in 1986, and 23-year-old Laura Houghteling in 1992. He was also given a 10-year sentence for robbery after stealing from a former landlord.