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An 18-year-old South Elgin man has been identified by the Kane County Coroner’s Office as the person shot Monday in Elgin by an off-duty Kane County sheriff’s deputy.

An autopsy conducted Wednesday found the preliminary cause of Tyquaze Nicolas’ death to be multiple gunshot wounds, the coroner’s office said.

Until that information was issued, no details on the incident other than time and place — 4:35 p.m. Monday near Walnut Avenue and National Street — had been disclosed by the Kane County Major Crimes Task Force, which is handling the investigation, or the Kane County State’s Attorney’s Office.

The state’s attorney’s office said no information would be made public until the investigation was complete, something that might “take a few months.”

State’s Attorney Jamie Mosser reviewed the case evidence Tuesday afternoon with law enforcement representatives from Elgin, Batavia, St. Charles, Carpentersville, Geneva, Montgomery, North Aurora and South Elgin, all of which are members of the task force.

Police congregate in the intersection of National Street and Walnut Avenue in Elgin Monday afternoon following a shooting by an off-duty police officer. (Gloria Casas/The Courier-News)
Elgin police congregate in the intersection of National Street and Walnut Avenue in Elgin in July following a fatal shooting of a robbery suspect by an off-duty Kane County sheriff's deputy. It was one of 65 cases involving gunfire in the city in 2024. (Gloria Casas/The Courier-News)

As of Wednesday, the name, age, sex and address of the shooting victim and the circumstances of what led to shooting, the name of the deputy involved, how many shots were fired, if anyone else was involved or if the deputy has been placed on administrative leave had been revealed.

However, Kane County Sheriff Ron Hain, in an interview with WGN-TV Tuesday morning, disclosed that the shooting resulted from a robbery in progress that the deputy happened to come upon while driving through the area. He fired his weapon when the suspect pulled a gun, Hain said.

Since then, the sheriff has declined to speak about the incident and news releases from the state’s attorney’s office have said his account has not been officially confirmed.

According to Tuesday’s news release from Mosser’s office, “Every case involving the use of deadly force by a police officer, whether on or off duty, must be carefully and thoroughly investigated.

“State’s Attorney Mosser will not release any further information regarding this incident until the investigation is complete. These investigations typically take a few months, at which time the State’s Attorney will issue a full report outlining the investigation’s findings and conclusion. This policy preserves the integrity of the investigation and the privacy of individuals involved in the investigation prior to any public charging for violations of the law. It also serves to protect the rights of people not yet charged with a crime.”

Mosser thanked the “public for their patience” and offered “condolences” to the family of the person he died.

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