Don't know about in Tombstone.
But in later years Earp refereed a boxing match in San Francisco and was accused of fixing the fight.
He was also carrying a gun while at the boxing match; was later arrested and fined for illegally carrying a handgun.
"...Right after Earp stepped into the ring a San Francisco police captain noticed the Colt 45 pistol Earp had stashed under his jacket and confiscated it in full view of the spectators.
...While the court ruling saved Earp from going on trial for fixing the fight, he was convicted of carrying a concealed handgun into the ring and fined $50."
https://www.theguardian.com/sport/2015/jul/22/wyatt-earp-botched-heavyweight-boxing-championship
But in later years Earp refereed a boxing match in San Francisco and was accused of fixing the fight.
He was also carrying a gun while at the boxing match; was later arrested and fined for illegally carrying a handgun.
"...Right after Earp stepped into the ring a San Francisco police captain noticed the Colt 45 pistol Earp had stashed under his jacket and confiscated it in full view of the spectators.
...While the court ruling saved Earp from going on trial for fixing the fight, he was convicted of carrying a concealed handgun into the ring and fined $50."
https://www.theguardian.com/sport/2015/jul/22/wyatt-earp-botched-heavyweight-boxing-championship