Hoshiar Bajwa, 64, was working alone when he was assaulted by a group of males near the Pitt River Middle School.
On Monday, the teen was charged with one count of aggravated assault.
“We cannot name the youth due to the Youth Criminal Justice Act,” said Cpl. Jamie Chung.
“Our investigation is not over yet. We are still examining other pieces of evidence. We are urging anyone with information, no matter how trivial you think it is, to come forward. It could be just the bit of information we need to bring those responsible to justice.”
Anyone with information is asked to contact Coquitlam RCMP or Crime Stoppers.