I am sure that's not how it went down, but could be a formula for helping a dog beat a favorite.
There seems to be a certain pattern with regards to upsets and officiating. The officiating either appears nuetral, or in favor of the dog at the onset.
I really can't recall a game where the underdog got shafted early on, got way behind, and in their comeback either got no help from the refs, or overcame ref bias the entire game.
Most upsets, the dog seems to get help from refs from the get go, get the benefit of the doubt on close plays, many times get help with obviously incorrect calls, get biased calls in their favor, and the favorite is held at bay by holding calls. Then the dog just 'miraculously' makes a skill play that doesn't involve the refs at the end, or the better team that was getting screwed by the refs, makes an uncharacteristic mistake at the end.