The bank robbery happened at the TD Bank in Gloucester City on Wednesday afternoon.
That boy, Justin Ellis, spoke to Action News on Friday. He and his friends were just getting out of school on Wednesday afternoon when they encountered the robber.
Police say 54-year-old Steven Hill entered the bank and handed the teller a note demanding cash. He got the money along with a dye pack that exploded as he left the bank.
It was at that moment that 11-year-old Justin Ellis was leaving Costello Elementary School with his friends.
"I was just like 'What is he doing? He's so stupid. Why's he just going to rob a bank while kids are coming out of school?'" said Justin. He and his friends acted without hesitation.
"Me and Darrin started chasing him," Justin said as he watched the bank robber's every move.
"The ink bag exploded and he put his shirt in the trash can and he threw the money at the side of the house and kept walking down Broadway," said Justin.
The other boys pointed police in the right direction. When officers caught up with Justin, he identified the suspect and helped police recover all of the evidence.
"With the help his help, it just made this case that much more rock solid," said Chief George Berglund of the Gloucester City Police.
Hill is charged with robbery and is being held on $100,000 cash bail.