Former NFL star wide receiver Antonio Brown could face up to 30 years in prison if convicted of attempted murder because a firearm was allegedly used, a prosecutor said Monday. Brown appeared via video at a brief arraignment hearing in Miami-Dade Circuit Court in which his lawyer, Mark Eiglarsh, repeated that Brown already entered a not guilty plea. An attempted murder charge in Florida carries a maximum 15-year prison sentence in many cases. But Assistant State Attorney Stephanie Cruz said because Brown allegedly used a gun, he could face double that time behind bars because of a firearm sentencing enhancement. Brown was extradited last week from Dubai, where he has business interests, after an arrest warrant on the attempted murder charge was issued in June.