The Wright incident occurred on July 30,  1979.  Ewing was arrested 5 years later.  At the time of his nolo plea he was unable to produce an alibi for the exact date and time of the attack.  But payroll records from YMCA Storer Camps (where he worked for years) show that Ewing was employed during that time period.

Several years into his prison sentence, a former co-worker, Bassem El-Hibri, was able to document Ewing's whereabouts on the day in question.

Ewing spent years at Camp Storer as a trip leader for mountain climbing and back-backing expeditions.  On the day of the Wright attack he was miles away preparing for the next outing.