He left the library around 1:10 p.m. and his vehicle was seen in Berthoud shortly before 1:30 p.m. Steffen has cognitive impairment and needs medication.
Charles Arthur Bell is listed as missing since March 18 on the Wyoming Missing Persons website, which is maintained by the Wyoming Division of Criminal Investigation.
The Wyoming Division of Criminal Investigation is asking for the public's help in finding a 27-year-old Rock Springs man who has been missing since November.