[2021] can't find the zealot osgar, only a dead man carried by a horse

so i tried to find the last zealot on my list and it supposed to be osgar and from youtube i knew that he/she is located in area near Black Peak Grantbirdgescire, i waited for 30 mins no one shows so i summoned synin and what i found was a horse not so far from my location,so i came to the horse and what i found was a dead body and it looks like a zealot since normal NPCs dont wear a black colored armor like i showed you in the picture. is it a bug? im on PC, help. The problem is, i cant even do anything to the dead body and there was even no "confirm kill" option