Alieu Kosiah killed civilians and unarmed soldiers, and ordered lootings and other crimes against humanity. Switzerland's supreme court on Friday upheld a 20-year jail sentence for former Liberian warlord Alieu Kosiah, but overturned a conviction for crimes against humanity. The top Swiss court on Friday confirmed a guilty verdict against a Liberian warlord, upholding his 20 year sentence in the country's first ever war.