(UPDATE, 11:20 a.m.) Crosby has been found and is safe.
The GFPD says that a driver recognized Crosby from a Facebook post and called 911 when they spotted him near Ulm.
Sheriff's deputies were dispatched to investigate and found Crosby walking along a fenceline, unharmed.
The deputies took Crosby home to his family.
The GFPD noted: "Thank you to everyone who shared our post and called in tips. We appreciate knowing we can count on you to help."
(1st REPORT) The Great Falls Police Department said on Thursday morning that a search is underway for 13-year old Crosby Newman.
Crosby was last seen at his home in the Fox Farm area on the southwest side of town at around 3 a.m.
Crosby has autism and is very shy.
- Likely wearing black boots, black jogger sweatpants, and a gray or blue long sleeve shirt
- 5'7" tall, 120 pounds, pale skin, light brown medium-length hair
If you believe you see him, please keep eyes on him and call 911 immediately.