Bapok Jerang hailed from the village of Kebang, situated in the Pangin Tehsil within the East Siang District of Arunachal Pradesh, India. He played a part in the tragic killing of Dr. J.D. Gregorson at Guak Camp. Along with Lomlo Darang and Kutkam, they carried out an attack on Gregorson, resulting in his immediate death. Bapok Jerang voluntarily surrendered in May 1912, and subsequently, he faced trial in the Deputy Commissioner’s Court in Lakhimpur on the 18th of May. He was found guilty of the murder of Dr. Gregorson, which led to his initial death sentence. However, this sentence was later commuted to life transportation by the Chief Commissioner of Assam.