Attorneys — Secondary counsel — Conflict of interest — Attorneys may not represent defendant as secondary counsel where attorneys’ firm previously represented another client in a related criminal case who is cooperating with the government and may testify against defendant — Waivers signed by the defendant and former client/witness are insufficient to overcome court’s concern with the public’s perception regarding fairness of the proceedings where disqualified attorneys’ firm has agreed to compensate the former client/witness’s new attorney while simultaneously representing defendant at trial — Court declines to decide whether disqualified attorneys’ representation would be prohibited by the Rules Regulating the Florida Bar because disqualified attorneys’ representation provides an insurmountable conflict pursuant to the Sixth Amendment