16-year-old boy, 15-year-old girl shot in Greater Grand Crossing

CHICAGO (WLS) -- Andrew Holmes, whose 16-year-old nephew was critically injured in Chicago's Greater Grand Crossing neighborhood, said something like this "could happen to anybody's family" - but right now, it's his.

Marquis Stewart, 16, and a 15-year-old female classmate were walking in the 0-100-block of Marquette Road near the Dan Ryan Expressway around 4:45 p.m. Thursday. Police said an unknown man approached them on foot and fired shots before fleeing the scene.

Stewart was struck in the chest. The girl suffered gunshot wounds to her shoulder and arm.

Stewart underwent surgery at Stroger Hospital, where he is listed in critical condition. The 15-year-old was taken to Comer Children's Hospital in stable condition.

Andrew Holmes arrived at the scene on Thursday before realizing his nephew was one of the victims. He rushed to the hospital when he found out.

"It's tearing me up inside. I've had moments where I've had to walk away from family just to get myself together," Holmes said. "But at the same time I have to stay strong I have to stay on my mission to try and decrease the violence and teach them about keeping their hands off those guns. It could happen to anybody's family. Right now it's my family."

Holmes believes the shooting stemmed from an earlier fight at Dunbar High School where his nephew and the female victim go to school. Police dealt with an altercation at Dunbar earlier in the day on Thursday.

Authorities said Stewart is a documented gang member, but Holmes said he was not aware of Stewart having any gang affiliation or association.

"He's human. He's my nephew, someone's child. But if there is any indication of that, that's something we as a family need to address and address immediately," Holmes said. "But at the same time as far as I know he goes to school, plays basketball, supposedly at school and that's as far as I know. If there was any indication that there was trouble I'm 100 percent sure before my sister would contact me his father would contact me."

Holmes, whose mission is to stop Chicago violence, said he talks to Stewart about staying away from guns and trouble. His nephew has even passed out crime fliers in the past.

Police are investigating the shooting. No one is in custody.