On December 10, 1981, an employee of the Oregon Humane Society was near a pond on the 1000 block of NE Columbia Boulevard at approximately 12:40 pm, when he observed what looked to be a red parka in the pond. Upon further inspection, he discovered that it was a deceased individual. Police responded to find the victim, Mario Rivera, a 42-year-old Hispanic man. An autopsy revealed that he had died as the result of being beaten about the head with a blunt object.
Mario Rivera was described, by most individuals interviewed, as being rowdy and was frequently drunk. He was also reported to be verbally abusive and disrespectful.
Witnesses reported seeing a red object in the pond, similar to his parka, as early as Monday, December 7.
If you or anyone you know has any information regarding the murder of Mario Rivera, you are encouraged to contact CrimeStopppers at 503-823-HELP.