thomas driver , david moran , and charles newcomb each were arrested on one state count of conspiracy to commit murder .
the florida attorney general 's office said the murder plotting started after driver had a fight with the inmate .
driver is an officer at the department of corrections reception and medical center in rural north florida .
moran is currently an officer sergeant at that facility . newcomb was fired in 2013 for failing to meet training requirements , the department said .
prosecutors said the three were also members of the traditionalist american knights of the ku klux klan .
the group has garnered attention in recent months for distributing flyers that likened protesters in ferguson , missouri to terrorists .