Wakandans don't fear monsters or the boogie man, they fear T'Chaka the-murder-you-at-night-and-have-your-kids-find-yo-ass Panther. T'Chaka ended two man's whole career's that night.
He had to have known, Zuri was there with N'jobu so there's no way he didn't know he had a kid. Plus if he didn't know, that just makes it even worse that he just left him with nothing. No sorry for killing your dad account, no nothing.