Board Thread:Site Questions/@comment-26268104-20151017165941

So, I am writing a creepypasta about a guy who kidnaps people and performs experiments on them to cure his dad of lung cancer. I wanted to make it so this wiki could have a serial-killer story, but with a character who feels realistic and understands what he's doing.

On to my question. I learned to avoid playing the tradegy card too early. However, I do not want to have endless exposition before I get to the experiment part, but at the same time, I do not want to have him do the experiments without us knowing anything about him or his dad. How much exposition should I inculde? 