Another person arrested for involvement in October 2023 armed robbery during which teen girl was killed

Demarco Smith copy

Demarco Smith | Photo courtesy of Quincy Police Department

QUINCY — A Quincy man wanted for his involvement in an armed robbery, when a 16-year-old girl was killed in October 2023, was arrested Monday.

Officers with the Quincy Police Department learned at 11:20 a.m. Monday, April 1, that Demarco Smith, 19, of Quincy, was at a residence in the 1400 block of Spring.

When officers arrived at the front of the residence, Smith attempted to flee out the back door and a back window before surrendering to officers at the front of the residence. Smith was taken into custody without further incident. He is lodged in the Adams County Jail. 

Other arrests are possible as the investigation continues.

Fallon M. Gillum and Tristian L. Johnson were arrested in November in connection with the incident. Both eventually agreed in February to plead guilty to mob action, a Class 4 felony, and accept an 18-month sentence in the Illinois Department of Corrections.

Three Quincy juveniles also were arrested Oct. 17 on warrants for conspiracy to commit armed robbery and conspiracy to commit robbery. They were lodged in the Adams County Juvenile Detention Center.

Sgt. Adam Gibson with the Quincy Police Department said other arrests are pending as the investigation continues.

Assistant State’s Attorney Josh Jones had said in Adams County Circuit Court that Mackenzie Bullard, 16, was shot in the head and killed as the result of an armed robbery during which a group of adults and juveniles allegedly conspired to steal a gun. Bullard, a student in the Quincy School District, was found dead in the early morning of Oct. 11 in a home on the 400 block of Scenic Drive.

Smith had been wanted since the shooting and was a Quincy Regional Crime Stoppers Fugitive of the Week in early December.

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