Yeah, something doesn't add up, unless the AFP are just blowing smoke out of their ass by saying this guy is some kind of Lulzsec leader or if they're saying this based off of evidence that may be inadmissible. Attacking a small town's city government doesn't really fit, though these assholes will do stuff like that.
For instance when my city attacked a charity for feeding the homeless downtown a couple years back, the Anonyputz types attacked the Bus system's website and knocked the bastard offline completely except for the trip planner that Google hosts, kicking the dog that didn't bite them basically instead of attacking the courts, the cops, the person who filed complaints against them, the city government itsself or that district's councilwoman, or anyone else directly involved with the Police intimidation and harassment that was going on.
Nope, they fucked the people who depend on public transportation instead, who are generally low-income themselves, a small step above the homeless people served by the charity they were "defending". So it wouldn't shock me if he did indeed do something like this to correct some slight or injustice from his point of view.
However, If he is indeed some leader of Lulzsec it would shock me if he got caught doing it.