The great Milarepa came from a life of killing and stealing to becoming a saint. Be mindful of being afraid to be reborned into the other realms, but do not attach yourself to this fear.
Sorry prana, I have a few more questions for you.
1) Couldn't he have killed a lot in his last life, but at the time of that death, some really good karma from an even prior life was ripening and thus he was born a saint? So, he's born a saint, but he still has all that "killing karma" left to worry about?
2) If someone is good, only for fear of being reborn in a hell realm, wouldn't they be aquiring selfish karma, and thus bad karma?
3) Can killing be good karma? What if someone assassinated Hitler, thus preventing many many deaths?
4) I'm not bugging you with my questions am i?
Thanks,
Iron