They base them off of the original stories - you need to watch it to really get it. They're longer than average, with episode lengths (each episode is an hour and a half long). They're based, loosely, on the original cases, but made more modern to fit the modern day setting. Just imdb.com it or something for more on it. It's a good show, I like it at least.

And yay!! I got my Anthro Notecard done! I think I'll head to bed soon.