Missing person: 17-year-old Mateo in green hoodie

I lost my 17-year-old brother Mateo yesterday around 3pm. Last seen near the New River Valley Mall on Roanoke Street in Christiansburg, wearing a bright green hoodie, dark jeans, and white sneakers. He’s about 5'9", with short black hair and a sun-shaped tattoo on his right forearm; he also wears a thin silver chain. He tends to wander, and this really scares us because he has autism. If you’ve seen him or know where he is, share any info via this listing.