When Can Surprise Testimony by a State’s Witness Result in a Mistrial?
Texas prosecutors often rely on the testimony of alleged victims or eyewitnesses to obtain convictions for violent crimes. It is important to remember that witnesses are only human, and sometimes they will testify in a manner that the prosecution did not expect. Such surprise testimony may put the defense at a serious disadvantage by not allowing them to properly prepare in anticipation of such testimony. In some circumstances, the introduction of surprise testimony to the jury can be grounds for a mistrial, which could ultimately prevent a defendant from being convicted. The Texas Court of Appeals recently addressed a defendant’s appeal that surprise evidence introduced in his prosecution should have resulted in a mistrial.
In this recent case, a man had been charged with sexual assault after a woman alleged he picked her up from the side of the road and assaulted her at knifepoint. During the trial, there was a surprising revelation during the alleged victim’s testimony about her profession as a prostitute, which caused the defense to request a mistrial. The witness testified that she was working as a prostitute on the night of the assault, which the defense claimed was not disclosed by the prosecution, alleging a violation of the Brady rule, which requires the state to disclose exculpatory evidence. The trial court denied the defense motion, the defendant was convicted, and he appealed the mistrial ruling.
On appeal, the prosecution argued that they did not have prior knowledge of the witness’s profession because she mentioned it for the first time during her trial testimony. The prosecutor explained that the witness had come from out of state and hadn’t discussed the specifics of the case with the prosecution until just before taking the stand.