The tentative suggestion has been made. Turns out he was shot three times in the forehead from within 10 yards, which stuck in the medical examiner’s craw for some reason… Rumor is also that he maybe was not well-liked in his unit, possibly because he was a public critic of the Iraq war who quoted Chomsky … His uniform was burned after his death and his diary apparently disappeared … There are even whispers that a faction of his unit had some hand in the opium trade…? Add in the constant official obfuscation, and you have - viola - the Pat Tillman Conspiracy.
One of the commenters in the linked article says,
Three rounds in the forehead? That was no mistake, no friendly fire incident. Whoever killed Tillman was close enough to kiss him. The cover-up has all the characteristics of a cover-up conducted by flag officers. Too many people have been silenced in too many different places for anyone of lower rank to have done it. They shut down the unit itself and cut off contact with the outside world while they were getting their story straight, they burned Tillman’s uniform and armor, and they somehow kept the medical question from triggering a real investigation. Then the CID investigation was shut down. The reach was outside the Special Operations Command. That says “Flag officer involvement.”
Flag officers = political appointees.