Wyo. Stat. § 1-14-111: Witness or juror entitled to but single day's service for multiple criminal cases and on grand juries.

If a witness or juror is summoned to serve in more than one (1) criminal case in the same court on the same day, the witness or juror is entitled to but one (1) day's service, which shall be taxed as costs in the first case. The officer swearing the witness or juror shall keep a proper account of the fees in order that not more than one (1) payment is made under such circumstances. This also applies to grand juries and witnesses before grand juries.