- Recruited off the streets, most of his time with the order is a blur, drugs and brainwashing and mindwipes. Some of the memories obviously hallucinations - monsters and impossible crazy weirdness.
He knows he killed people. Probably important people. Just not the one he's blamed for - the junkie prostitute they found him with. That was a set up, when he'd started to break through the conditioning.
He wound up locked in an institution, not sure what if anything was real through a drugged fog. In time, he started to recover and believe what they told him, though he was still troubled by flashes of memories. Until an assassin came hunting him and almost purely by reflex disarmed and killed him, then broke out and fled. Now he's come to Hong Kong looking for those behind it.
This is all intentionally vague. What actually happened and how much it ties into the game is up to you. He could easily have been working for some faction inthe Chi War and seen actual magic and monsters, but is just writing that off as impossible or he could have been in a more mundane group and the weird stuff is just a product of the brainwashing.
