Missing person: Eli Chen in blue hoodie

I lost my younger brother, Eli Chen, yesterday around 3pm in Roanoke. He's about 5'9", slender, with short black hair and a light complexion. He was wearing a bright blue zip-up hoodie, a gray t-shirt underneath, dark jeans, and white sneakers with a red stripe. He has a small crescent tattoo on his left wrist and wears a green camouflage backpack with a blue patch. We were last seen near the Grandin Theatre on Grandin Road, heading toward Jefferson Street. He's usually gentle but can get overwhelmed in crowds; I’m really worried he might wander off or get separated. If you see him, send me a message here with any information.