You should have been smarter. Asked for more information BEFORE agreeing. Asked to meet the guy. Ask for a visit to hell first, or at least the brochure. I'd have no issue taking a life to save a life I love but I would want more info. Life is really very short. What happens after? What waits the person I'm saving if I interfere and change their fate? What waits me? These are things I'd need to know. That I'm not making things actually worse for them. Informed decisions and all that.