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The Kern County Sheriff's Office says Billy Nelson Lewis, 63, is a critical missing person who was last seen at about 5 p.m. Feb. 21 in Maricopa. He has medical conditions that require medication.

Kern County Sheriff's deputies are searching for a Maricopa man who has been missing since Feb. 21.

Billy Lewis, 63, suffers from various conditions requiring medication.

He is described as white, 5 feet 9 inches, weighing 160 pounds with brown hair and blue eyes.

He was last seen about 5 p.m. Friday near Elkhorn Grade and Golden Cat roads in Maricopa.

Anyone with information about his whereabouts is asked to call the sheriff's office at 661-861-3110.