Sorry brother - that is an incorrect assertion (I see no evidence to substantiate)... The confusion might be the fact that the Army tried to cover up the Fratricide initially by claiming that his death was caused by enemy fire - as a means to save their own inept embarrassment and to some extent a not very well thought out attempt to hide the truth from his family, friends and country for everything that his good name meant to be a true Patriot...
Soldier Speaks Up A Decade After Pat Tillman's Friendly-Fire Death
https://www.npr.org/sections/thetwo...decade-after-pat-tillmans-friendly-fire-death
"Tillman's group, which had traveled ahead,
scaled a ridgeline to provide assistance to fellow Rangers under attack. But a squad leader, Sgt. Greg Baker, in Elliott's armored vehicle misidentified an allied Afghan soldier positioned next to Tillman as the enemy and opened fire, killing the Afghan and prompting Elliott and two other Rangers to fire upon what Elliott called shadowy images, later learned to have been Tillman and then-19-year-old Bryan O'Neal."
Forensic experts have determined that rounds from Elliott's weapon were probably not the ones that killed Tillman. But that doesn't change anything, he tells NPR.
He says that on the evening of the incident, he saw his squad leader engage Tillman's position and followed suit.
"I remember thinking for just a second or two, but what felt like longer — your perception of time in the midst of a firefight can be distorted — that if he'd fired, and without any other information to indicate a friendly position, that I should also fire," he says.
Tillman's family was initially told that their son was killed by enemy fire. It was not until more than a month later that they learned the actual details of his death.