Your transcription is different from mine and harder to read due to lack of some kanji IMO. You may want to check out the epub I have: Intermediate Japanese Book Club // Now Reading: 怪人二十面相 (Jan 4th) - #4883 by simias
A somewhat clunky translation that attempts to stick to the Japanese structure:
However, no matter how much [he] hates blood, because [he]'s somebody who does bad things, if [his] own body is in danger, and [he] wants to escape, we don’t know what [he]'s capable of doing.