In Columbia, South Carolina, a delusional young man is gunning down locals in cold blood with a 12-gauge shotgun. Our experts analyze this evil killer, as he leads detectives on a chase across state lines all the way to Texas.

In upstate New York, a series of brutally violent stabbings set police on the trail of a spree killer who targets women with increasing ferocity. Our three experts unpack this twisted killer's unusual compulsion to kill.