What happens if a witness refuses to obey a subpoena during a board inquiry?

When a witness refuses to obey a subpoena during a board inquiry, the appropriate action for the board is to petition a district court. This is in line with legal procedures that allow the board to seek enforcement of the subpoena. By petitioning the court, the board can compel the witness to comply with the subpoena and provide the necessary testimony or documents relevant to the inquiry.

This option is correct because it provides a legal avenue to address non-compliance with a subpoena, maintaining the integrity of the board's inquiry. The judiciary plays a critical role in ensuring that witnesses fulfill their obligations under the law, and intervention by a district court can lead to enforcement measures, including holding the witness in contempt if they continue to refuse.

The other options suggest outcomes that do not align with due process or the established legal framework governing board inquiries. For example, dismissing the case or halting further action would not uphold the board's authority or its mandate to investigate. Immediate arrest is not a first-response measure in this context, as it is generally a last resort and involves due legal processes. Therefore, seeking a court petition is the correct and most effective response for the board.