Tom was becoming an embarassment to the cattle barons and politicians in Wyoming and had to be removed. He was, but he wasn't hanged.
I grew up with family and hired hands who knew Tom. I remember one of the hands who served on Tom's jury. He was put there to tip the jury but it didn't work.
Tom gave the bridle he braided awaiting the hanging to my Uncle.. It's still in the family.
A neighbor claimed til the day he died that Tom died of old age in the Sandwich (Hawaiian) Islands.. He was paid to feed and train a fast horse and tie him up behind the court house on the day Tom was to be hanged. Horse was gone after things were over. I heard this guy tell that story over and over as a kid.
He claimed they hanged a hobo picked up in the railroad yards. Nobody ever saw Tom's face when he was hanged. He had a hood over his head the entire time.
Tom was spooky son of a gun and probably guilty of a lot of things, but he din't kill Willie. Again, family members lived near the Nickell place and knew who killed Willie.