You can be a murderer-sodomite-pagan and as long as 1) you genuinely intend for the baptism to do what baptisms are supposed to do and 2) the recipient's life is in danger, the baptism is legit, if conditional and requiring confirmation should the person survive. As far as Catholics are concerned, baptism is a big one, 'cause it gets you out of Original Sin.

I was always fascinated by this shit in CCD 'cause it's so Hermetic.