Villains can always escape from prison if they feel like it. Just look at Spiderman (TV show)... those guys get out after 2 weeks as if the door was right open.
man all I can say is I like the future nanako look... and wait why the heck didnt Adachi change at ALL? Nanako looks about 7-8 years older, and yet he didnt change a bit
What the hell do you mean? The Adachi I knew didn't have a mustache or a nose like that. Obviously time has taken its toll on him. Hell, even his eyesight has deteriorated.
Also, Adachi was 30 or so whereas Nanako was 6. I hate to break it to you but a 30 year old turning to a 38 year old won't change that much much a 6 year old changing to a 14 year old will look totally different.