HRS §835-7
What happens when a witness on bail does not show up
If a witness who is out on bail under a material witness order cannot be found or notified when they need to appear, or if they are notified but do not show up, the court can issue a warrant. The warrant tells a police officer to arrest the witness anywhere in the state and bring them to court immediately.
courts
The statute, as written — Material witness order; compelling attendance of witness who fails to appear
If a witness at liberty on bail pursuant to a material witness order cannot be found or notified at the time the witness' appearance as a witness is required, or if after notification the witness fails to appear in such action or proceeding as required, the court may issue a warrant, addressed to a police officer, directing such officer to take such witness into custody anywhere within the State and to bring the witness to the court forthwith.
LawTrove is not legal advice. The summary above is a computer-generated restatement — the authoritative text is the official version linked above.