As soon as the news of Williamson's arrest on charge of cattle thieving became known a large mob formed and set out in pursuit of the deputy sheriff and his prisoner. On his way to Mason, Worley was overtaken by this posse. When he saw the pursuing men Williamson divined their purpose and begged the sheriff to let him run in an effort to save his life. Worley refused and, it is said, drew his pistol and deliberately shot Williamson's horse through the loin, causing it to fall. Unarmed and unmounted Williamson was killed without a chance to protect himself and without any pretense of a trial. After the murder Worley and the mob disappeared. Whether or not Williamson was guilty of the charge against him, he had friends who bitterly resented the deputy sheriff's refusal to allow the murdered man a chance for his life and his death caused a great deal of excitement and bitter comment in the county. A man named Scott Cooley, an ex-ranger of Captain Perry's Company "D," was a particular friend of Williamson and his family. Cooley had quit the ranger service at the time of his friend's murder and was cultivating a farm near Menardville. He had worked for the dead man and had made two trips up the trail with him. While working with the murdered cattleman Cooley had contracted a bad case of typhoid fever and had been nursed back to health by Mrs. Williamson's own hands. When the news of Tim Williamson's murder reached Scott Cooley he was much incensed, and vowed vengeance against the murderers of his friend. He left his farm at once and, saddling his pony, rode into the town of Mason heavily armed. He had worked out a careful plan of his own and proceeded to put it into execution immediately on his arrival. Stabling his horse in a livery stable, he registered at the hotel. As he was entirely unknown in Mason, Cooley remained in town several days without creating any suspicion. He proved himself a good detective, and soon discovered that the sheriff and his deputy were the leaders in the mob that had killed his friend. Biding his time and pursuing his investigations he soon learned the names of every man in the posse that murdered Williamson. His information complete, Cooley decided upon action. He mounted his pony and rode out to the home of John Worley, the deputy sheriff that had refused Williamson a chance to flee for his life. Cooley found Worley engaged in cleaning out a well. The avenger dismounted, asked for a drink of water and entered into conversation with the unsuspecting man. Finally, as Worley was drawing his assistant out of the well, Cooley asked him if his name was John Worley. The deputy sheriff replied that it was. Cooley then declared his mission and shot the sheriff to death.