The fourth person was never named because he was an instructor acting as * safety pilot* to a very low hours but very confident PPL.
Perhaps he was a bit sheepish that he didn't intervene much earlier and get P1 to do a pretty smart 180 and get the h*ll out of it.
I think in these circumstances I'd exercise my right to anonimity if I ever wanted a job in aviation again.
And the A/c was virtually brand new. Ouch!