Rock County, WI Death Investigation: Beloit Man Arrested in Alleged Homicide of 14-Year-Old This Week

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Turtle, WI – A 14-year-old was found dead inside a Town of Turtle home Friday morning, prompting a multi-agency response and a homicide arrest.

According to the Rock County Sheriff’s Office, the incident unfolded around 7:56 a.m. Friday when deputies, along with Beloit police and fire personnel and the Town of Turtle Police and Fire Departments, responded to a welfare check in the 2000 block of East Gorton Street.

Authorities said responding officers located a 14-year-old deceased inside the residence. Investigators allege that a suspect was quickly identified, and 41-year-old Tyiece L. Oninski of Beloit was taken into custody. Oninski is accused of first-degree intentional homicide in connection with the death, according to law enforcement.

Officials said the Rock County Sheriff’s Office, working alongside the Rock County Medical Examiner’s Office, continues to investigate the circumstances surrounding the death. Additional details about what allegedly led to the incident have not yet been released.

Law enforcement emphasized that the charge is an allegation, and Oninski is presumed innocent unless and until proven guilty in a court of law.

The case remains active, and authorities indicated more information may be made public as the investigation progresses.

Anyone with information related to the case is encouraged to contact the Rock County Sheriff’s Office.


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