Are C. Dorner's actions and detailed manifesto why LAPD is investigating his complaints now?

Is the LAPD trying to clear its name?
I know nothing of this case – just what I have read and seen on TV. I am also not condoning his actions. I am just wondering whether his complaints are all true.
Out of curiosity, I clicked on Dorner’s uncensored manifesto and started reading. Shocking. If all of it is true, he certainly has suffered injustices and incredible frustration over his career. He gives details: names, dates, witnesses, document numbers, etc., for events and cover-ups by the LAPD. He lists names, service records, and ID numbers of incidents where he was labelled a “whistle blower” and punished for his actions due to the libelous testimony of others.
In his manifesto, he begs journalists to investigate his claims and initiate Freedom of Information actions to verify the data.
Are LAPD shredders running now?