A couple of quick tips:
1. Renaming characters etc will do you NO good at all if you do a single radio interview were you say "Oh - I based the events on the major University near me" - or mention it on a message board
If it is public knowledge who you REALLY meant, then it doesn't matter.
2. A MAJOR problem where authors get stuck is claiming motivations on the accused. You can say "They returned to the scene that night, and destroyed evidence before the police arrived" .. if it is true. You can NOT say "They went back to the scene that night
to destroy evidence before the police arrived."
See the difference? One is a provable fact. The other attributes motive to them ('they did it for XX reason') which is fundamentally unprovable.
You can say "They paid woman who claimed they were raped out of their legal fund" if you can prove it is true.
You can NOT say "They set up the fund to pay women who they raped" - even if one person claims it is true, you'll find more who just say it is a general legal fund. The most you could probably say is that "XXX, who set up the fund for the University, stated that the purpose of the fund was to pay women who the students raped. YYY denied that the fund was for that purpose, and points out that XXX was never involved in the day-to-day running of the fund."
Even in your few brief statements, you've managed to violate this 'never attribute motive' rule more than once !!!!
What is he going to do? Take me to court and sue me because he recognizes himself from the illegal actions of my fictional character?
No. He'll take you to court to sue you because he has suffered harm (say, to his reputation) by your publication of the claims. He'll also sue the publisher, who will have a lot more to lose.
Put it this way - do you have statutary declarations from witnesses etc for EVERY SINGLE CLAIM that you make? Just being 'general knowledge' or 'everyone knows that' isn't enough. At the very very least that is what the legal department of the publisher will insist on. At the very least.
At the very least, the hospital could easily get an injunction because you are claiming that the hospital/medical waste processor is violating rules, ethics etc - what is your proof?
It also brings up another aspect - if you do have evidence of these crimes, then the accused will always ask why you haven't handed over your evidence to the Police?
I am saying some bad things about people and mostly they deserve it
So even at the start of the project, you know that not everything you say is deserved?
In other words, you KNOW that some of the harmful things you are saying are undeserved. (Ignoring exactly who is judge, jury & executioner on 'deserved')
You basically are admitting that there are some statements where you KNOW you don't have the 'truth' defense on your side. Being 'partly' true is worse than being entirely false.
If it is entirely false than there are no similarities that people can recognise.
You really need to rethink this, IMHO.
Mac
(PS: As always - get real legal advice if you want to pursue the project.)
(PPS: You also can't assume that "Newspaper A printed it and didn't get sued, so I won't get sued either." It doesn't work that way. There have been cases were they've only gone after the 3rd or 4th person to repeat the rumour.)
(PPPS: Even if the alleged drug dealer has made the claim himself, that doesn't make it true. Plenty of people have used the 'I was just telling tall tales when I was drunk. Any real researcher would get real evidence before relying on it' defense - and it really is plausible.)