If Bill Johnson's blithering, incoherent attack on the ferry audit wasn't enough to convince you of his incompetence, perhaps this buried gem from the City's response to the audit might:
...the City is currently at a disadvantage when responding to this Report. Almost all of the officials of the administration of Mayor William Johnson in office during the time period covered by the report and who were principally involved in the fast ferry operation are no longer with the City...
Res Ipsa Loquitur
