Suppose there exists a black hole with a large + electrical charge. The escape velocity for any given particle will depend on the net force on it, gravitational + electrical. It seems logical that the more positive a particles charge the lower its escape velocity will be from any given point. If the escape velocity for a neutral particle, such as a neutron or photon, would be > c then that particle is inside the black holes event horizon. But if a proton would have a lower escape velocity then it would seem possible for it to escape from a lower position then the photon could.
Is anything wrong with my logic so far? If not I have more questions about the implications of this but I don't want to get too speculative if there is some serious flaw with what I've said so far.