There is no available information from the provided sources or general online sources that details the death of an individual named Arthur Rivera, age 27, from Denver, CO, who died on June 5, 1977. The sources provided do not mention this individual or the circumstances of his death.
To gather detailed information about such an event, one would typically need to consult specific records or reports related to the incident, such as police reports, news archives, or other local historical
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