In our group, we have instituted some incident reports through our website.
One of those reports is for a certified umpire to report something regarding another certified umpire. Certified is the highest ranking in our association. We also have a report for a non-certified umpire to report regarding a non-certified. We don't make it out to be a witch hunt, but to make sure that all of our umpires are on the same page (hopefully) on mechanics and rule knowledge. A lofty goal, and probably unattainable, but our goal none the less. Just an idea to consider that may have been applicable in your situation.
HS Incident Reports