Thomas M. Dorn was a Marine Private First Class who served in the Marine Corps before dying after suffering a heart attack at the age of twenty-two.
The history that Captain Brent Peters had taken revealed that Dorn was born on June 6th, 1978 and that he joined the United States in or around June 1999 before a car accident crushed his ankle, causing him to undergo surgery on May 15th, 2000 with Gunnery Vestman telling NCIS Special Agent Leroy Jethro Gibbs that he suspected Dorn had a coke addiction.
Two years later on April 2nd 2002, Dorn was declared dead although the dead person in question was later revealed to be his friend, Corporal Morgan whose remains were later cremated, all for the sake of scamming an insurance company out of three quarters of a million dollars.
Dorn also listed his half-sister Melissa Dorn as his next of kin but one day on 2004, Dorn was given a batch of digitalis which caused him to suffer a fatal heart attack and resulted in his death instantly. Dr. Sylvia Chalmers, Melissa's mother who had given Dorn the fatal medication later cut up Dorn's remains and buried all the remains of his body throughout West Virginia with NCIS later being called in after a junk dealer discovered Dorn's leg in a dumpster in Clarksberg.
The truth behind the scam eventually came to light and both Chalmers and Melissa were both arrested and jailed while Dorn's body parts were being recovered although according to DiNozzo, the left leg and head were still unaccounted for.