So you sold multiple little kids to pedo's aristocrats? Oh, but you failed to do the same to me and were discriminated against 'cus you're a half-elf? Okay, I forgive for everything and let you go!
STFU Arito. Its not yours to forgive while it IS yours to judge. Kill 'm now or turn them in, where they will be dealt with by their erstwhile customers to silence them, before those same customers come after you because you might know about them. So, just kill them and be done with. Your good deed for the day: take out the trash.