A silver alert is issued by the North Carolina Center for Missing Persons to find a Rockingham County woman. Tyknha Pleasant Johnson is black, 22 years old and 5-11 weighing 170 pounds. She has short black hair and brown eyes. Johnson was last seen in Stoneville and according to the alert she is believed to be suffering from dementia or some other cognitive impairment. Call 9-1-1 if you’ve seen her.