Don’t forget, if he was involved, or simply walking with, Mikey when he was killed, Johnson can be charged with felony murder.
Yep, that’s my point exactly.
No, he can’t be charged with felony murder if he was “simply walking with” Brown. The felony murder rule doesn’t work that way. Heck, even if he was involved in the original robbery, he probably can’t be charged with felony murder, since the resulting fight/shooting did not occur during the robbery or during the immediate flight therefrom.
We know that won’t happen.