Byrion Montgomery is charged as an adult with nine counts of first degree murder, attempted first degree murder, home invasion, aggravated battery with a firearm, and aggravated unlawful use of a weapon, according to the Will County State's Attorney's Office. His bail has been set at $20 million. He is due in court Tuesday.
Police said Montgomery was dating the teen girl who was killed in the incident. His family has declined to comment on the charges.
Bolingbrook police responded to the 100-block of Lee Lane, just off Route 53, about 8:15 p.m. for a report of a possible home invasion. When police arrived, they found four people had been shot.
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A man and two juvenile girls were pronounced dead, police said. A woman, 34, was taken to a local hospital for treatment.
A 3-year-old boy and a 14-year-old boy were inside the home during the shooting, but were not injured, police said.
Two of the victims were identified as 17-year-old Samiya A. Shelton-Tillman and 40-year-old Cartez L. Daniels. The third victim, a 9-year-old girl, has not been identified but relatives say she is Daniels' daughter. Relatives said Daniels was engaged to Shelton-Tillman's mother.
Relatives say the 34-year-old woman who was shot is Daniels' fiancee and Shelton-Tillman's mother. She's in critical but stable condition at Good Samaritan Hospital, police said.
Montgomery was taken into custody at about 10 p.m., police said. He had been dating Shelton-Tillman. Police said they are working on charges with the Will County State's Attorney's Office.
RELATED: Chicago shooting: Man shoots, seriously injures home invader in Dunning, police say
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A neighbor heard the gunshots in the normally safe and quiet area.
"Came home from dropping off my kids, and got inside and heard two gunshots," neighbor Ryan Hedberg said. "There was apparently more, but that's what we heard when we were sitting inside."
Another neighbor, who did not want to be identified, said her son was playing video games with the girl who was killed at the time of the shooting.
"My son was playing a game, and then he ran in the room, and was like, 'Mom, I think something happened' to his friend. I said, 'why would you say that?' He said he was playing the game, and then he heard gunshots go out, and then he didn't hear his friend anymore," she said.
Bolingbrook police were on the scene investigating until about 5:30 a.m. Monday.
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"Just seeing the number of ambulances on the street, I knew it was something really bad," another neighbor who goes by Karen said.
"Very nice people. Never had a problem," said neighbor Stan Mesich. "The kids would be out during the summer. They would be shooting baskets at one of the houses there. The kids were very good kids."
Longtime resident Lashuna Fisher drove by the neighborhood to get a glimpse and could not believe what happened in her normally quiet and safe community.
"Very devastating because I'm a long resident of Bolingbrook, all I know is Bolingbrook. When something like this hit in Bolingbrook, it just like is hitting home, it's like family but not family," Fisher said.
Anyone with information about this incident can contact the Bolingbrook Police Department Investigations Division at 630-226-8620, or, to remain anonymous, call Crime Stoppers at 630-378-4772. A tip may also be submitted at bolingbrookcrimestoppers.org or by using the mobile P3 Tips app.