It is incorrect information that the Mayor of Pittsburgh is under investigation for corruption or anything else.
The Chief of Police of the City of Pittsburgh was found to have misappropriated funds, purchasing things like a television for his home and other items. He immediately resigned/was fired.
At the very same time it was announced that the Chief of Police was being charged, it was also announced that the Mayor WAS NOT involved and that he was NOT being investigated.
Shortly afterwards the Mayor announced he would not run for re-election.
Here is what would be the latest news on any investigations:
http://www.post-gazette.com/stories...his-job-despite-federal-investigation-691351/
Any news of on-going investigations seem to be related to valet parking.