Must Utah trial courts grant continuances for late expert witness disclosure? State v. Arellano Explained

In State v. Arellano, the Utah Court of Appeals clarified that trial courts must grant continuances when prosecutors fail to comply with the mandatory expert witness notice requirements, even when such continuances create administrative inconvenience.

Background and Facts

Billy Arellano was an inmate at Utah State Prison who was observed picking up an envelope containing cocaine while on food service duty. The substance was tested by state crime lab chemist Jennifer McNair, who prepared a toxicology report. However, the State waited until just five days before trial to notify the defense of its intent to call McNair as an expert witness, violating Utah Code Ann. § 77-17-13‘s requirement of 30-day advance notice. The defense moved for either a continuance or exclusion of McNair’s testimony, but the trial court denied both motions, citing inconvenience to the court and jury.

Key Legal Issues

The central issue was whether a trial court abuses its discretion by denying a continuance when the prosecution fails to comply with Utah’s expert witness notification statute. The statute requires parties to provide expert disclosure “not less than 30 days before trial” and states that opposing parties “shall be entitled to a continuance” when this requirement is violated.

Court’s Analysis and Holding

The Court of Appeals applied the four-factor test from State v. Begishe, examining: (1) defendant’s diligence in trial preparation, (2) likelihood the continuance would meet defendant’s needs, (3) inconvenience to the court and opposing party, and (4) harm to defendant from denial. The court emphasized that the statutory word “shall” is mandatory, not discretionary, and that administrative inconvenience cannot override a defendant’s right to fair trial preparation. The court found the defendant was prejudiced because he could not adequately prepare to cross-examine the expert or obtain rebuttal testimony.

Practice Implications

This decision reinforces that Utah’s expert witness notice requirements serve essential due process functions. Practitioners should note that the burden shifts to the prosecution to prove lack of prejudice when their disclosure violations impair the defense. The ruling also clarifies that defendants need not anticipate undisclosed expert witnesses, and that administrative convenience cannot justify denying statutorily mandated relief.