Update: The alert has been canceled.
Statement as issued Tuesday by the Indiana State Police:
A STATEWIDE Silver Alert has been declared. The Vigo County Sheriff is investigating the disappearance of an adult from Terre Haute, Indiana. Terre Haute, Indiana is located approximately 80 miles west of Indianapolis, Indiana. Ronald E. Stevens Sr. is a 75 year old white male, 5 feet 10 inches tall, 181 lbs, with short brown hair and brown eyes. Ronald E. Stevens Sr. was last seen on Monday, November 26, 2012 in Terre Haute, Indiana, and is believed to be in danger. It is unknown what type clothing Mr. Stevens may be wearing. Ronald E. Stevens Sr. may be disoriented and require medical assistance. He is believed to be driving a 2008, 4 door Cadillac, White in color with Indiana plate 127BPS. If you have any information on Mr. Stevens, contact the Vigo County Sheriff by calling 812-232-3801