# If any of the men whom I bring into your hands escapes

"If any of these men that I brought into your control escapes" or "If any of the men that are inside gets away" 

# whoever lets that man escape, his life will be taken for the life of the one who escaped

"we will kill the man who let him escape"

# for the life of the one

"in exchange for the life of the man" or "for the man"