His life as a free man is over. Some people linger near the frayed edges of sanity and spend too much time gazing at fantasy. Too much time detached from our shared reality.
This is one of the reasons I never thought shows like Dexter were good for society. Not healthy. Most of us can separate real from not real, but some become absorbed in the darkness and prefer that to the light.
Perhaps even more so as the player becomes an active participant in the fantasy.
I think as Virtual Reality technology improves in video games people like this man will become more common.