What “evidence” are you demanding here? Do you even understand what’s going on? If so can you explain it in your own words - i.e. who is bring the lawsuit, how they work, what their job is, and so on. Because I don’t think you understand any of that.
As for “the voice of the accused”, Activision-Blizzard, have, after initially denying everything, admitted that a lot of fucked-up shit happened. They then tried to shred the evidence. This isn’t speculation note, this is well-recorded fact. So we have an admission of wrong-doing from the employer.
The specific “accused” in this case who have been named are Allen J Brack (not accused of doing anything, accused of failing to do anything) - he’s resigned after essentially admitting he fucked up - and Alex Afrasiabi - Afrasiabi was FIRED by Blizzard over a year ago, specifically because of this stuff - seven years ago he sexually assaulted a woman and was allowed to continue working at Blizzard note - Blizzard’s own records (and Afrasiabi’s admission at the time) are that that happened. And they’ve been contacted for interviews and have decided not to give them - not even to hard-right journalists who might give them an easy time. So they’ve chosen not to speak. No-one is silencing them. Why don’t you contact Afrasiabi and ask him to explain how it was “all a misunderstanding”? Somehow I think he’d rather hide out and hope he doesn’t face criminal charges (which he could well).
And no, taping people in the loo isn’t a “sackable offence”. This is California. There’s no such thing as a “sackable offence”. Do you even know how American labour law works? On a basic level? In almost all states including California you can sack anyone for anything at any time. Bad haircut? Fired. Don’t like his taste in music? Fired. Came in on time but you didn’t like how he was walking? Fired. Drives the wrong model of car? Fired. All that is fine - the only things you can’t fire people for are protected characteristics - i.e. race, gender, religion and sometimes other stuff (whether you’re married or not, sexuality, trans status in some states, and so on). Business can optionally codify this if they want but a lot don’t and it seems like Blizzard didn’t (hence Afrasiabi being allowed to continue working after a sexual assault - which is a crime, note, even if it wasn’t prosecuted).
I’d suggest learning some basic facts about the subject as a start here. US labour law is not UK labour law.
And let’s be clear, in most of the US, including California, taping someone in the loo is a CRIMINAL offence. Jail time. Sex offenders registry. Not “sacking”. If Blizzard shredded any records relating to that some people there may be going to jail too for messing with a criminal investigation.