User blog comment:Collisions/Demoting an owner/@comment-366087-20151019103048

Dudeguy touched on the process.

You have to have to start a forum or blog thread calling for a vote for removal of the Admin/Bureaucrat in question, and yes, that includes Founders as well. Typically it should run a week, but however long, a definitive deadline should be mentioned in the OP so that it is not open-ended. After a week, the votes should be counted. Votes, not number of comments as it should be 1 vote per participant. Then use Special:Contact to provide Staff the link along with a brief synopsis of the issue.

The local administration should not interfere with the thread OR the participants. If they do interfere, delete, or otherwise meddle, then use S:C to ask Staff to watch over the situation. They can restore anything deleted and warn not to interfere. I've seen Admins temporarily removed for ignoring Staff's warnings—which can become permanent depending on the outcome of the consensus.

Word of warning: all participants will need to be on their best behavior because participation in the vote does not mean they cannot be blocked for proper reasons. If they are acting up against the rules, even onerous ones, of Wikia or Local, the Admin(s) are within their rights to block. So no mouthing off, arguments, or things which might be construed or deemed as edit wars, etc. Best Behavior. Because if a proper block is handed out, Staff will not reverse it.

Since you say the admin in question is the only Bureaucrat, then a second thread should be created to discuss who among the community should be considered for promotion as a replacement. A separate thread so the voting is not muddied in any way. Send that link to S:C as well when the time comes.

Only use Special:Contact to reach Staff. VSTF has nothing to do with this process.