I also looked into this incident.

Calling the guy who was detained by private security guards a "reporter" is not correct.

He has his own political website. There is no paper or news organization to work for.

He has been following Joe Miller around and asksing personal questions that no candidate should have to put up with.

He has filed harassing lawsuits also.

The blogger tried to get to Miller by bodychecking someone into a gym locker, which is why he was detained. He had already been asked to leave and told he was in trespass before he bumped the Miller supporter.