I doubt very seriously whether he went to the Ramsey company Christmas party. Why would he? Not even all the employees went to it.
The company had 600 employees and only 300 went to the luncheon.
When would Karr have left Hamilton, AL, to get to Boulder in time for lunch? He substitute-taught the day before, December 19th, at Vina School in Franklin Co., AL.
Did the Ramsey's have a open house? (like a decorate the house for Christmas and let people tour the house kinda thing?)
Where did you find that he substituted on the 19th? First I've heard that.