A 21-year-old Illinois man was charged Wednesday with the stabbing deaths of his grandparents in suburban Chicago earlier this week, the Chicago Tribune reports.

Romel D. Tyson was found sitting in a chair in a bedroom in his grandparents’ Markham home on Monday after police entered for a wellness check on Gabriel Tyson Sr., 66, and his 65-year-old wife, Carmella Tyson.

They found the grandfather dead of multiple stab wounds in the living room and the grandmother unresponsive in another bedroom, also suffering from multiple stab wounds, according to the Chicago Sun-Times. Both were pronounced dead at around 5 p.m.

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The medical examiner determined that both deaths were homicides by sharp force injuries.

Romel Tyson had been living with his grandparents since his release on parole from the Cook County Jail on June 22. He had been serving a sentence for a residential burglary conviction.

City spokesman Michael Taylor said Tyson was charged with two counts of first degree murder after the Cook County state’s attorney’s office approved the charges.

He is expected in court on Thursday.

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[Featured image: Romel D Tyson/City of Markham]