I posted earlier and no subsequent poster has changed my mind, for the following reasons:
Fact: nine people present, including Lubbock
Fact: three were women. Not capable of restraining and assaulting Lubbock; even intoxicated he would have fought them off. So he was raped and killed by male(s).
Fact: his injuries included facial marks consistent with suffocating.
Conclusion: Lubbock was restrained by at least one male while being assaulted by another.
Quite likely that more than one was involved because a 31 year old man in fit condition as he was would have been very difficult to restrain even by 2 equivalent men. But we know at minimum 2 did it.
Fact: Barrymore claimed to have been with others at the time of the attack / death.
Conclusion: if he is telling the truth, he knows through a process of elimination who the attackers were. Why hasn’t he told police in no uncertain terms who they must have been?
Fact: Barrymore claimed not to be able to swim. Credibility extremely poor here - his late wife said he could; he was a fit man in early middle age who had owned a mansion with a pool for some years.
Fact: Barrymore fled the scene. Innocent people don’t do this, if there’s been a tragic accident at their home.
Conclusion- not proving guilt but casting suspicion.
Fact: police made a hash of the scene.
Reason: likely star struck by Barrymore, failed to question version of events or realise a drowning very unlikely in a small pool with plenty of adults present, at least some of whom could swim.
Conclusion overall - Barrymore must know far more than he’s admitted; he has never shown proper remorse and frankly looks as guilty as sin to me.