for the past couple of times ive watched it before they even get evidence and stuff im like it must be the boy cause ... and it always seems to be right :L good guess maybe or maybe i just know the couple of points
1. there is always 2 or more dead bodies, usually the suspect is the second one that dies.
2. they sometimes dont focus on the killer but everyone else...so you can kinda tell
3. I picked up some techinques from lie to me, with cal and YOUR A LIAR! :L