A Silver Alert has been issued for Maricopa County. This is the Arizona Department of Public Safety. The Mesa Police Department is looking for 77-year-old Gregory Tanchuk. Gregory is a white male, 5 feet 4 inches tall, 100 pounds, with grey hair and blue eyes. Gregory was last seen wearing a yellow t-shirt, black jacket, blue pants, and white tennis shoes. Gregory has a scruffy beard and mustache. Gregory was last seen on foot at 4:30 P.M. at his care facility in the area of 200 West Brown Street in Mesa. Gregory suffers from a medical condition which may cause him to appear confused. If you have seen Gregory, please contact the Mesa Police Department at 480-644-2211 or call 9 1 1.