he secrecy rule may be relaxed, in the discretion of the court, upon the laying of a proper predicate. See Minton v. State, Fla. 1959, 113 So.2d 361; Trafficante v. State, Fla. 1957, 92 So.2d 811; State ex rel. Brown v. Dewell, 123 Fla. 785, 167 So. 687. The proper procedure in such a case is for the trial jud