Florida is dropping charges against an attorney once accused of being at the center of a $300 million gambling ring that led to the 2013 resignation of Lt. Gov. Jennifer Carroll.

Jacksonville attorney Kelly Mathis was convicted of 103 counts of racketeering, possessing slot machines and other charges and sentenced to six years in prison. But an appeals court last year ruled that Mathis deserved a new trial because his attorneys were not allowed to call witnesses that could have bolstered his defense against the charges. The Florida Supreme Court in February declined to take up the case.