LINCOLN, Neb. (AP) — A legislative committee investigating Nebraska’s prison problems has voted unanimously to subpoena Gov. Dave Heineman to testify in a hearing later this month.

Panel members voted 7-0 on Thursday to summon the governor to their next hearing on Oct. 29.

The committee is looking into hundreds of prison sentences that were miscalculated, as well as a subsequent prisoner roundup that may have violated state law.

They’re also probing the state’s handling of Nikko Jenkins, who was released from prison despite warnings from state ombudsmen and psychiatrists who examined him while he was incarcerated. Jenkins had pleaded for mental health treatment, and went on to kill four people in Omaha shortly after his release.