Black Panther director Ryan Coogler has revealed what really happened to Erik 'Killmonger' Stevens' mother. Speaking during the commentary for the 'Black Panther' Blu-ray, Coogler explained: 'The idea was when you see those guys talking over the paperwork in the beginning of the film, they're talking about a way to break her out of jail. The idea was they never got her out, and she passed away in prison, so Killmonger didn't come up with a mom either.'