Make Google deindex bad backlinks to competitor's site??

I have a competitor who has 12,000 backlinks to his site that were mostly created when his site was part of a large blog network. Every blog in that network had dynamically rotating links to other blogs in the network. He has since taken his blog off the network, but Google still has those backlinks indexed.

As proof, I searched his backlinks, then went to the page a backlink was supposedly on, and the actual link was no where to be found on that page.

How long will it take Google to realize none of these links actually point to his site?

Can I speed up the process?

I know you can report a site, but in this case, he's done nothing wrong - he's just getting credit for backlinks that no longer actually point to his site.

Do the same steps as you would to get thous Backlinks indexed for the first(assuming they where actually there). Let me explain a bit more in detail.

Ping thous links every other day for the next week or two.
Make a couple rss feeds of the links from random websites and send thous rss out to rss sites.
Make a blogger site and make a few pages of thous links and feed that too rss sites.
Maje a new gmail account send a list of thous links to yourself via an attachment in a common format like excel, docs, txt esc..,,

Be patient and maybe next time worry about your own portfolio a little more then your ccompetitions.

If those backlinks are making him rank and are not there anymore, it's just a matter of time.

You could spam each blog with like a 100 blog comments using scrapebox and then submit those urls to lindexed. That would certainly speed up the indexing process.

If they are HIGH PR, all you got to do is just ping them

You might go through all this effort and find out he actually moved up in rankings in a couple of weeks! Why? Because while you were scraping and pinging your competitors links (which G may or may not have already noticed anyway), he/she has concentrating on their own site and since built new better quality links and added new good quality content!