"sheer experience of killing" . "thrill of the kill" . "thrill of committing murder" . "thrill-killings" . "Thomas Koskovich and Jayson Vreeland" . "Thrill" . "Thrill killing" . "kill for kicks" . "Thrill killing" . . . "thrill killer" . "thrill" . . "for the experience" . "Random street assaults" . . "thrill killing" . "thrill killers" . . .