It's not yet clear if that incident was the basis for Greer's arrest. The Sentinel reports today:
Florida Department of Law Enforcement agents brought Greer, of Oviedo, to the Seminole County jail shortly before 10 a.m., a Sheriff's Office spokeswoman confirmed.
State law enforcement officials will hold a press conference at 11:30 a.m. ET to "announce a major arrest."
Greer was appointed by Crist in 2007 to run the Florida Republican Party, but was forced out of the job in January, after reports of lavish party spending, much of which went on the credit card of the party's executive director, Delmar Johnson.
Full coverage from TPMmuckraker here.
(This post has been updated since it was published.)