Your son was a popular young man, an NFL draft pick, a natural showboater, and a patriot who gave up that fame and fortune for useful work in an outfit that shies away from publicity. He died. He was shot while in the field. He died of his wounds, in the arms of his brothers, behind enemy lines, doing what he was trained to do - something he volunteered for at least twice.
Apparently his earlier years of grandstanding came from you - HE gave up FAME when he joined the Army Special Forces. He will always be your little boy, you have pictures, memories and artifacts from his life, and a nice crisp flag from his funeral. Your job is to be his cheerleader now as when he was alive. Stop talking about how he died and just cherish your memories of his life. You disgrace the memory of your child and degrade the morale of the U.S. people, the military, the government, and his brothers-in-arms when you give interviews, speak at hearings, sell books or made-for-TV movies questioning the minute details.
Part of Special Forces Operations includes psychological warfare. The enemy needs to be scared of American forces. American forces need to be confident and proud. American citizens need to be supportive of the volunteer professional warriors of which our entire military is made. The story of your son's life and death was important to our psy-ops. The exact circumstances of his demise should not be public - or even, in my opinion, shared with you. He's dead - that's the important point to your family.
He was a man, of legal age, and a trained warrior. He followed his orders with vigor. He doesn't need you to defend him now, or to attack that which he stood for. He was a positive role model and he now needs you to carry on with his living wishes.