Capo testified that at this time appellant told him the circumstances of the killings.
On cross-examination, defense counsel asked Capo why he was at David Goodwin’s house talking with appellant about the murders. Capo responded that he was there to inquire what had become of Chris Goodwin, who had been left offshore in a small boat the night of the smuggling operation. Defense counsel then asked whether Capo was an instrumental part of the importation scheme.
At this point witness Capo’s own attorney asked to approach the bench. He invoked the privilege against self-incrimination on behalf of his client, who, he said, was subject to prosecution in federal court. The jury was taken out of the courtroom and argument was heard. The court limited cross-examination to the witness’s knowledge of the murders and declined to allow inquiry into his participation in the smuggling plan generally. Defense counsel objected and moved for a mistrial.
The objection interposed by Capo’s attorney was based upon the argument that defense counsel’s questioning had exceeded the scope of permissible cross-examination, although relevance and the witness’s interest in not incriminating himself were also mentioned. Appellant’s motion for mistrial, taking exception to the court’s ruling sustaining the objection, was grounded on the argument that the line of questioning was relevant to the issue of the witness’s credibility.
The right of a criminal defendant to cross-examine adverse witnesses is derived from the Sixth Amendment and due process right to confront one’s accusers. One accused of crime therefore has an absolute right to full and fair cross-examination. Coco v. State, 62 So.2d 892 (Fla.1953). A limitation on cross-examination that prevents the defendant from achieving the purposes for which it exists may be harmful error.
The proper purposes of cross-examination are: (1) to weaken, test, or demonstrate the impossibility of the testimony of the witness on direct examination and, (2) to impeach the credibility of the witness, which may involve, among other things, showing his possible interest in the outcome of the case. Burns v. Freund, 49 So.2d 592 (Fla.1950); Louette v. State, 152 Fla. 495, 12 So.2d 168 (1943); Leavine v. State, 109 Fla. 447, 147 So. 897 (1933); Padgett v. State, 64 Fla. 389, 59 So. 946 (1912). Therefore it is held that questions on cross-examination must either relate to credibility or be germane to the matters brought out on direct examination. Pearce v. State, 93 Fla. 504, 112 So. 83 (1927); Wallace v. State, 41 Fla. 547, 26 So. 713 (1899). If the defendant seeks to elicit testimony from an adverse witness which goes beyond the scope encompassed by the testimony of the witness on direct examination, other than matters going to credibility, he must make the witness his own. Stated more succinctly, this rule posits that the defendant may not use cross-examination as a vehicle for presenting defensive evidence. Coco v. State, 62 So.2d 892 (Fla.1953); Padgett v. State, 64 Fla. 389, 59 So. 946 (1912).
In summary, the rule permits inquiry into “all the facts and circumstances connected with the matters of the direct examination.” It does not, however, “preclude an inquiry as to the animus, interest, or motives of a witness in reference to the parties litigant or the subject-matter of the suit.” Tischler v. Apple, 30 Fla. 132, 138-39, 11 So. 273, 275 (1892).
Appellant argues that Coxwell v. State, 361 So.2d 148 (Fla.1978), is applicable to this case. In Coxwell, the Court held
that where a criminal defendant in a capital case, while exercising his sixth amendment right to confront and cross-examine the witnesses against him, inquiries of a key prosecution witness regarding matters which are both germane to that witness’ testimony on direct examination and plausibly relevant to the defense, an abuse of discretion by the trial judge in curtailing that inquiry may easily constitute reversible error.
Id. at 152 (citation omitted). Appellant contends: