Didn't we kick this to death three years ago when it happened?

There isn't, and never has been, any coverup of the incident and the responsibility for it. The A-10 pilots followed all of their procedures and had permission to fire; the ground control people who told them there were no friendly forces in the area gave this incorrect information and a tragedy occurred. The refusal of the US military to release the guncamera video is consistent with its long-standing (if shortsided) policy of not divulging any "how we know what we know" information.

As a matter of information, since I don't know what the law says in the UK, if there is no question of when, how and by whom this soldier was killed, why is a coroner's inquest being held?