A silver alert has been issued for a 78-year-old Catawba County man last seen on 31st Street Lane NE in Hickory. Karlheinz Mueller “is believed to be suffering from dementia or some other cognitive impairment and The Hickory Daily Record reports is described as 5-feet-6-inches tall, weighs 153 pounds and has short, gray hair and blue eyes. The alert also included a description of a vehicle: a silver 2016 Kia Forte with North Carolina license plate FAB-3339.