1) his lawyer and his closest family seem to agree that the lawsuit was the driving force

2) he did it on the anniversary of the start of the lawsuit

3) the actual trial was to start shortly

4) So far when under outside pressure he held up pretty good, but this was pressure far exceeding his previous exposure

Now, none of that is conclusive proof. But I don't see any reason brought forward other than the lawsuit why he killed himself. Absent such proof I tend to believe strongly that this was the reason why he did it.

If you don't want to believe that then that's fine with me but it does mean that you are ignoring some evidence right in front of your eyes.