materiality and favorability is aimed; the objective of such an evidentiary showing is to require that a defendant citing constitutional error under the Sixth Amendment must first prove that the testimony at issue had relevance to the defense of his case. 15 . Baxter v. Palmigiano, 425 U.S. 308, 319, 96 S.Ct. 1551, 47 L.Ed.2d 810 (1976) (recognizing that “in proper circumstances silence in the face of accusation is a relevant fact not barred from evidence by the Due Process Clause” and allowing adverse inference from inmate’s silence at prison disciplinary proceeding); accord U.S. ex rel. Bilokumsky v. Tod, 263 U.S. 149, 153-54, 44 S.Ct. 54, 68 L.Ed. 221 (1923) (stating that "[s]ilence is often evidence of the most persuasive character”); Gray v. State, 368 Md. 529, 796 A.2d 697 (2002) (<HOLDING>); see also Syl. Pt. 9, State ex rel. Myers v.
holding that trial court has discretion to permit defendant to call accused witness to stand and permit witness to invoke fifth amendment privilege in front of jury where entire defense was centered on witness commission of crime recognizing that trial court has duty to determine whether witness silence is properly grounded in fifth amendment and to require witness to answer where refusal to testify is not warranted holding that trial court did not abuse its discretion by refusing to strike witnesss testimony on direct examination when witness asserted fifth amendment on collateral matters on crossexamination particularly when witness was required to invoke privilege in presence of jury holding that the defendants due process rights were violated when the trial judge singled out the only defense witness and indicated to that witness that he expected the witness to he and would personally ensure that the witness was prosecuted for perjury and thereby effectively drove that witness off the stand holding that accused has right to crossexamine witness on issue of a witness potential bias that stemmed from the fact that the witness had instituted a civil action for damages against the defendant arising from the crime charged