The Arizona Department of Corrections says a minimum-custody inmate walked away from an off-site work crew in Casa Grande Wednesday night. Officials say 38-year old Joshua J. Speedling walked away from the crew around 8-pm.  Speedling is described as a white male, 6’4, and 215-pounds. Speedling was sentenced to five years in prison on charges of forgery, criminal possession of a forgery device and a dangerous drug.