UPDATE — The Silver Alert has been canceled as of 4:42 p.m.   COLUMBIA CITY — The Whitley County Sheriff’s Department is investigating the disappearance of David A. Whisler, a 45-year-old white male, 5 feet 8 inches tall, 235 pounds, brown hair with brown eyes, and driving a red 2010 Ford F-150 pickup truck with Indiana …read more.