Paul Dafelmair was a Corporal in the United States Marines who appeared in the episode, Hung Out to Dry (episode) where the NCIS team led by Leroy Jethro Gibbs were investigating the circumstances surrounding the death of a Marine, Lance Corporal Larry Fuentes who had died during a night-training jump.
While Gibbs and Anthony DiNozzo interviewed him, Dafelmair insisted that he was innocent and that the Corp had given him a second chance due to the fact that he had a criminal history involving drugs and shoplifting.
However, Abigail Sciuto later found evidence suggesting that Fuentes's parachute had been tampered with along with DNA which showed that despite his early pleas that he had changed, Dafelmair was involved with the drugs trade as Abby also told the team that the reside on Dafelmair's skin had come from cocaine that the Corporal had cutting and weighing.
Dafelmair was eventually arrested and presumably jailed; while it's never directly stated on-screen, he was most likely also court-martialed and dishonorably discharged.
A Corporal in the Marine Corps, Dafelmair claimed to be devoted to the Corp, as he felt that he had been given a 'second chance' after being convicted of narcotics offenses. Unfortunately, he was unable to stay clean, and murdered a fellow officer when his continued drug-dealing was discovered.
- Larry Fuentes- Dafelmair gave him a sabotaged parachute, which 'tootsie-rolled' (i.e, failed to open properly) during a training exercise. Fuentes subsequently fell to his death after plummeting into a parked vehicle.
- Dave Ramsey- framed for Fuentes' murder by Dafelmair when the latter officer planted a bottle of brass stripper in his locker.