Abdulla Kamil gets the information that Hakim Tufayl...
Abdulla Kamil gets the information that Hakim Tufayl, a killer of Hazrat Abbas, is under the protection of Adi Hakim Tai, a very powerful and prominent person in Kufa; Abdulla Kamil and his men goes to Adi Tai's house and arrests Hakim Tufayl; at the time, Adi Tai is not in but he soon gets news of the arrest.
Adi Tai goes straight to Mukhtar demanding the release of Hakim Tufayl saying he was under his protection; just then, Abdulla Kamil walks in with the head of Hakim Tufayl, explaining that on the way, when people heard of Hazrat Abbas's killer being arrested, they could not restrain their anger and immediately killed him; other reports say that the people were aware that should Hakim Tufayl go into the courtyard alive (especially when Adi Tai is already in the court to protest Hakim Tufayl's arrest), he was likely to be pardoned because of the pressure Mukhtar would be in, under the influence of the very prominent Adi Tai.
After seeing the ineffectiveness of the intervention of a prominent like Adi Tai, the rest of the major killers (like Shimr, Sinan, Hurmala, Umar Saad) were very worried about their lives. Sinan manages to escape from Kufa to a town of Zihad where he asks the people there for their protection; the people refuse for if they were found harbouring any killer, they knew Mukhtar would not spare them, so Sinan left.
After his departure, other people in the town objected to not giving protection to Sinan, so they went after him to bring him back to their town; Sinan sees a group of people running after him and thinks it is Mukhtar's soldiers, so he starts firing arrows; these people become angry for they were offering Sinan sanctuary, and he dares attack them, so the people fire back at Sinan, arrest him and take him to Mukhtar.
Sinan confesses in Mukhtar's court that amongst other crimes, he tried to steal a belt from Imam Husein (as) when he had fallen from his horse during the last few moments of his life; but the Imam repeatedly used his hands to cover the belt which was sewn by Lady Fatema (as), and Sinan cuts off Imam Husein's (as) hands in order to get to the belt; Mukhtar orders that Sinan's fingers should cut one at a time, then his elbows be cut, then his arms, his legs, and then finally thrown into fire until burned to death.
The other major killers are now shaking with fear after seeing the fate of Hakim Tufayl and Sinan; they meet together to make a plan to escape out of Kufa.