I decided to make him old, because, he really is, now. In the Judge Dredd comics time flows the same speed as in our own world. The first story about Dredd was published in 1977 and it tells of 2099-th year in the Dredd universe, meanwhile the story published in 2013 tells of 2135-th So, now Dredd is over 75 years old, 50 of which he dedicated to his work as a judge, but still he is the guy who will come for you if you commited a crime.