Updated at 4:15 p.m. Saturday: William Jackson has been found and is safe, according to police.
Original story: Dallas police are asking for help from the public finding a 72-year-old man who is considered a critical missing person.
William Jackson was last seen about 5 a.m. Saturday in the 3000 block of Newcastle Drive, near Walnut Hill Lane, in northwest Dallas. Police said Jackson may need assistance.
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Jackson is described as a 6-foot-2 white man who weighs about 130 pounds. He has blue eyes and is bald with white hair on the sides. He was wearing a blue plaid/flannel jacket and blue jeans.
Anyone with information may call the Dallas Police Department at 911 or 214-671-4268.