I've been shooting, hunting and bowhunting for more than 35 years here in Portugal, in five other countries in Europe (including France), occasionaly in Canada, US and Australia and in four countries in Africa and everywhere I found the same ethics, when shooting the one who kills is entittled to the quarry, when hunting is the first blood (hooves don't qualify) that scores.
Never heard of Iarcher's method but it's a big world.