Sounds like a case of a low wing aircraft being behind and higher than a high wing aircraft, making it difficult for either pilot to see the other plane. One afternoon, flying a C172, I was in a climbing left turn after taking off and suddenly another plane - low wing - went streaking in front of me - left to right -, maybe 100-150 feet higher than our pattern altitude of 800'. I was on the CTAF for the uncontrolled airport I flew out of, announcing position/intentions, but doubt this person was monitoring it. Because of the high wing on my plane,I couldn't see him as I made my turn unitl he was in front of me. Way too close.
No surprise.. Several posters here would volunteer to let Dotard put a bullet throuh their temple while they were --------- him.