According to TMZ, Flavor Flav was arrested in Las Vegas on October 5 on a misdemeanor charge of domestic battery. 

The website reports that Henderson County Police were called about a domestic disturbance. Upon arriving, police were told that Flav poked his finger on the alleged victim's nose, grabbed her, threw her down, and grabbed a phone out her hand.

Police arrested Flavor Flav at the scene, and he was booked and charged with misdemeanor battery constituting domestic violence. Flav's attorney, David Chesnoff, addressed the charges, telling TMZ, "in alleged domestic violence cases, there are often 2 sides to the story and we will explain our side in the courtroom and not in the media." 

Source: TMZ