Background
Jagon grew up on Chandrilla. He grew up in a moderatly comfortable environment, with his parents both working for the local government. Eventually his mother got into gambling debts and ultimately received a bounty on her head.
Eventually, someone came to collect the bounty. Sadly, it didn't go as planned. In front of Jagon, his mother was accidentally killed by the Bounty Hunter. They didn't have anything of value, so the Bounty Hunter decided to cut of the ring including the finger to bring some form of payback to the client. This grueling act would stay with Jagon for times to come.
When he was older, he took up the mantle of a Bounty Hunter in order to get closer to his mother's killer. After many years, eventually he found his quarry. While Bounty Hunters are restricted to kill one another due to their honor code, he staged a murder and exacted his revenge. In retaliation, he took a trophy of his own from the body. A custom he started using on bounties henceforth.
Motivation
Religion - During his time as a Bounty Hunter, he came to respect the Bounter Hunter creed and cannot see himself pursuing any other goal.