While his official resignation letter, filed on Tuesday at City Hall, gave no formal explanation, I think the search warrant executed June of last year might shed some light into why the mayor of Upland suddenly resigned.

Searching for evidence of racketeering, conspiracy, extortion, wire fraud, mail fraud, and bribery, investigators visited city hall and now-former Mayor John “JP” Pomerski’s home, removing boxes of documents and other evidence.

He had served as mayor since 2000, and his current term isn’t set to expire until 2012.

His resignation comes a month after the city council placed the city manager on leave.

From the San Bernardino Sun:

John “JP” Pomierski resigned as mayor on Tuesday amid a federal investigation.

Pomierski, who has been under investigation by the Federal Bureau of Investigation and the Internal Revenue Service, filed his resignation after clearing out his office at City Hall. He offered no explanation for his decision.

Mayor Pro Tem Brendan Brandt will assume mayoral duties.

“Working for the city of Upland over the past 10 years has been a very rewarding and gratifying experience, and I appreciate the opportunities given in serving the citizens of this fine city,” Pomierski said in his resignation letter.

Read the full article here.