Who killed, undertook, besieged, and abandoned Othman ?!

Topics
Abdulrahman bin Adis Al-Balawi
Amr Ibn al-Hamiq al-Khuzaee
Muhammad Ibn Abi Bakr Ibn Abi Quhafah
Summary of the violators of Usmaan's policy, including the Companions and Followers
Is Muhammad bin Umar al-Waqidi, the narrator of the tradition of the killing of Uthman, a liar and accused, as the oppossers claim?!