BOONE — A West Coast violence spreader with a history of domestic abuse has been packed off to an Iowa prison after admitting to another attack—his third or subsequent domestic-abuse assault offense.
Tythaniel Paul Sinkuler, 37, of Hoquiam, Washington, pleaded guilty in Iowa District Court to third-offense domestic abuse assault, a Class D felony.
The court sentenced Sinkuler to five years in prison and ordered him to serve a mandatory minimum of one year behind bars.
Repeat violence turns offense into felony
Iowa law classifies a third or subsequent domestic-abuse assault as a Class D felony, even when the underlying conduct might have carried a lower classification for a first-time offender.
The enhanced charge means Sinkuler had qualifying earlier domestic-abuse cases on his record before committing the Iowa offense.
The Boone County Attorney’s Office did not identify the victim or provide a detailed account of the attack in its sentencing announcement.
Separate strangulation-related arrest
Sinkuler also surfaced in an Iowa jail report earlier in 2026.
Authorities reported that Sinkuler, then listed as a Jefferson resident, was booked into the Greene County Jail on February 2 on accusations of domestic abuse assault by impeding airflow or blood circulation and violating a no-contact order.
That allegation involved a form of assault commonly associated with choking or strangulation. The publicly available report did not provide the victim’s identity or describe the victim’s condition.
The Greene County arrest was reported separately from the Boone Police Department case that resulted in Sinkuler’s latest conviction. Available summaries do not establish whether the two matters were connected.
Now in state custody
The Iowa Department of Corrections currently lists Sinkuler as being in custody at the Iowa Medical and Classification Center, the state’s reception and classification facility for prisoners entering the correctional system.
Sinkuler’s partially masked corrections identification number begins with 6597.
The Boone Police Department investigated the felony case that sent him to prison.