An Arlington man is reported missing since Thursday.

The family of Billy Kirby Sr., 86, reported him missing on Friday. They said has signs of dementia.

Arlington police issued a Silver Alert  and were later notified that Kirby was seen by the Dallas police on Thursday night.  Kirby reportedly spoke with officers in Dallas asking for directions back to Arlington.

Via KCEN:

Police now believe that Kirby poses a credible threat to his own safety and a state-wide Silver Alert has been issued. Kirby is believed to be driving a 2002 Chevrolet Silverado with Texas license plate 7FYZS. Kirby is 6 feet 2 inches tall, weighs about 250 pounds and was last seen wearing a blue, denim jacket and jeans. He has blue eyes and gray hair. Anyone who sees Mr. Kirby or has information about his whereabouts is encouraged to call the Arlington Police Department at 817-575-8823, or call 9-1-1 if an immediate response is needed