- Isiah Vos, a convicted killer, faces new charges for a prison incident from March 2025.
- He's accused of making a terrorism threat, rioting and assaulting an officer.
- The parole board hasn't decided on Vos' parole for murder.
SALT LAKE CITY — A day after telling the Utah Board of Pardons and Parole that he was never charged for an incident at the Utah State Prison last year that his brother was convicted of, the convicted killer is now facing charges for that incident.
Isiah Bo'Cage Vos, 39, was charged Wednesday in 3rd District Court with making a threat of terrorism, a second-degree felony. The charge comes with a habitual offender penalty enhancement if convicted. He was also charged with rioting and damaging a cell, third-degree felonies; assault on an officer, a class A misdemeanor; and interfering with an officer, a class B misdemeanor.
Vos was sentenced to prison a little over 20 years ago for shooting and killing Jeffrey L. Maestas, 21, in the driveway of a Salt Lake home in 2004. Vos was convicted of murder, a first-degree felony, and sentenced to a minimum of six years and up to life in prison with the possibility of parole.
On Tuesday, he went before the parole board. During his hearing, he was asked about an incident last year at the prison involving him and his brother, Terence Trent Vos. Terence Vos, a former Public Enemy No. 1 of the Salt Lake Metro Gang Unit, was convicted in the brutal 2021 murder of his girlfriend, 32-year-old Shandon Nicole Scott. Terence Vos was convicted on Monday of rioting and assault by a prisoner, which were originally charged as first-degree felonies and reduced to third-degree felonies, for the incident.
When asked on Tuesday about his involvement, Isiah Vos told the board he was not charged because he did not assault anyone. He contended there was a "standoff" with corrections officers that was the result of "a lot of things piling up," including his family "basically in crisis" at the time and a "personal feud with a deputy warden."
But according to charging documents filed on Wednesday, between March 22 and March 24, 2025, Vos "engaged in a pattern of threatening, obstructive and disruptive conduct toward correctional staff who were acting within the scope of their official duties."
When Vos was told that he and his brother would no longer be cellmates, "Vos issued a direct threat toward staff, stating that he would 'make one call to the yard' and that officers 'won't be going home tonight,' indicating an intent to intimidate and influence correctional personnel through threats of violence or retaliation," the charges state.
Later that evening, he and his brother barricaded themselves in a sub-dayroom and broke a sprinkler head, causing flooding in the housing unit, court documents state.
"Officers ordered Terence and Isiah to step back to which Terence was heard yelling, 'I'm prepared to die. We can't continue to lay down for this injustice' while Isiah was heard yelling known battle cries (for his gang)," according to the charges. "(Vos) has been sentenced to the Utah State Prison multiple times, yet continues to pick up violent felony charges. He has shown he is unwilling to comply with the law and would be a danger to the community if released."
The full parole board has yet to make a decision regarding parole on Vos' murder sentence. But the Salt Lake County District Attorney's Office has requested that Vos be held without the possibility of posting bail pending trial on his new charges.
The court documents do not indicate why the charges were filed a year after the incident and a day after his parole hearing.
