James died from sixteen stab wounds, his hands torn to ribbons defending himself from his enemies blades.
James's killers, Walter and Thomas Stewart where related to the king through Robert II of Scotland, and Robert and Thomas Graham were wealth landowners. They all managed to escape, but were soon found and all died horribly gruesome deaths in ways that don't bear thinking about.
Walter Stewart and Robert Graham had problems with James's rule that were numerous and complicated. They did conspire and act against the king in what appears to be a frenzied attack. However, I do realise these were hard and different times, but the way these men were dealt with was simply barbaric.