How do you know he wrote that manifesto? Because the news told you so?
GIVE IT A REST, willya?!?? This isn't some liberal round table, or a high school cafeteria. It's been well established that this fruitcake MURDERED folks because he was butt-hurt for being found unfit to be a cop, even in LA. THAT should speak volumes in and of itself. *IF* he had truly been innocent, he WOULD have availed himself of the various other agencies that he could have turned to - and he would have known who they were.
I had a very dear friend murdered a number of years back. Part of the ring that was responsible WAS local LEO's and judiciary. It took far longer than I liked, but even *I* was ultimately able to get the Feds involved and ultimately see the SOB's incarcerated and/or disgraced. I didn't go out taking things into my own hands, and this man was like a brother to me - so when I see the kind of shit you keep harping on, it flat-out pisses me off and makes me question your own level of maturity.
So either come up with SOLID EVIDENCE, or stop the juvenile crap, willya????