(CBS) – The 15-year-old grandson of Congressman Danny Davis was shot to death in his Englewood home Friday evening.

The shooting happened about 6:45 p.m. in the 5600 block of South Princeton, according to Chicago Police.

Javon Wilson, 14, was inside his home when two people broke in, started arguing with the boy and then shot him in the head, according to a statement from the congressman.

Wilson was pronounced dead at the scene at 7:32 p.m., according to the Cook County medical examiner’s office.

According to Davis, the two people who broke in were a 17-year-old girl and a 15-year-old boy who pulled a gun.

“I grieve for my family,” Davis said. “I grieve for the young man who pulled the trigger. I grieve for his family, his parents, his friends, some of whom will never see him again.”

Wilson’s mother had just left to pick up food before the shooting, leaving the boy with his two brothers, ages 8 and 14; his 16-year-old sister, and an uncle, Davis said.

“What could have prevented this tragedy? Better education, more supervision after school activity. Better parenting,” Davis said.

Police have identified a person of interest in the shooting, according to a tweet posted by CPD spokesman Anthony Guglielmi Saturday morning. He said the shooting was not random and was not the result of a home invasion, but that it stemmed from a dispute between teenagers about gym shoes.

No one was in custody Saturday morning as Area South detectives investigate.

Davis later sent out a tweet on Saturday with a statement on his grandson’s death. “Thanks to all that have contacted my family and staff. Please note the following and I appreciate your prayers during this difficult time.” The statement was attached.

Former U.S. Representative, Newt Gingrich sent out a tweet after Wilson’s death saying, “The murder Congressman Danny Davis’ 15 year old grandson in a Chicago home invasion is reminder we need a federal strategy to save lives.”

(Source: Sun-Times Media Wire © Chicago Sun-Times 2016. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)