Sixth Amendment right to attend the depositions under the Confrontation Clause of the federal Constitution. Christian v. Rhode, 41 F.3d 461, 465-66 (C.A. Ariz. 1994). See also, Coy v. Iowa, 487 U.S. 1012, 1015, 108 S.Ct. 2798, 2800, 101 L.Ed.2d 857 (1988). The Clause "guarantees the defendant a face-to-fac