Another possibility is that the accuser remembers someone coming in and years later "assigned" that memory to O'Dea.
Just returned from a visit to my parents where we each traded our recollections of a pretty significant event. Mine was my mother telling me my options over the phone and requiring a decision, my dad not home that night. My dad's was that he made the decision himself on the phone with a neighbor. My mom didn't remember any of it.
Last week, I couldn't find something that I took to the beach. My friend said I wrapped it in my beach towel and shoved the towel in the chair. My memory was that I considered doing that but opted against it because I feared it would fall out. However, I convinced myself that I had done this (I could picture myself doing it in my memory, not merely concluded that I "must have" done it), and that it had fallen out. (Notice that I still come out on the "right" side in this - it fell out!).
Later, I remembered where I actually put it.
You get the point if you've lasted this far. Some memories are accurate, some are not, some are a mix.
Noted that Barron's statement this time around tried to stake out some more sympathy for Jerry's victims. The press coverage had been credulous as usual. McQueary seems to continue to stand alone as trying to do something about what he saw.