I’ve thought about this way too much and if you seriously think you’re in danger, there’s a few things you can do. Obviously lots of security cameras with local and off-site backups. Then hidden cameras, whatever spy cameras you can find, with an SD card in each. Then you need to create a deadman switch. Something you must interact with at least daily or it automatically uploads all your videos and documents etc everywhere it can, and / or sends them to your lawyer or journalists if you think you can trust them. I err on the side of public release as well because as long as it’s in the public eye it will be subject to scrutiny. That’s also why I’d start establishing a social media presence. “HI I’m X, I blew the whistle on Y. There’s a hearing scheduled for Z and I would like to once again publicly state that I don’t have any current medical or mental health issues and I have no plans to ever take my own life. Anyway here’s how to make waffles” or whatever.