His partner , Tom Cover , reported they had been attacked by a band of Blackfeet Indians .
Some historians suspected that Bozeman was killed by Cover himself , or perhaps even by a henchman of pioneer Montana rancher Nelson Story .
His partner , Tom Cover , reported they had been attacked by a band of Blackfeet Indians , but some historians suspected that Bozeman was killed by Cover himself , or perhaps even by a henchman of pioneer Montana rancher Nelson Story .