Matthews was last seen at his home in East New York around 4 p.m. on Aug. 28, police confirmed. According to his family, the teen normally runs in Highland Park around the time that he disappeared, and that's where they believe he went.
"Normally he goes' to the park and he comes back in like an hour," Matthew's mother Patricia Mcallister told PIX11. "Nobody's heard from him, we haven't gotten any tip that anybody has seen him elsewhere."
"What the family has indicated to us is that he's not the type to run away, he's never done this before," said Donnell Nichols of NYC React Search and Rescue, a group aiding in the effort to find the teen. "He's never done this before -- (he has) no disciplinary issues, no mental issues."
Since the day he disappeared there has been no social media activity on any of his accounts.
His family and a team of volunteers have been pasting images of Matthews around the city every day in hopes of his safe return.
Matthews left the house with his wallet and book bag and has no cell phone, according to the family. He is 5 feet 5 inches tall, weighs 135 pounds, and was wearing size 8 1/2 Nike sneakers.
Anyone with information is asked to call police or contact his family at firstname.lastname@example.org