Word ociation?

"It was a dark and stormy night, not a fit night out for man nor beast. There was a knock at the door. It was Dad, with a bunch of words and numbers on a sheet of paper. Individually they meant nothing, but together they were a real mystery. Little did I know then that the final outcome of this scenario would be Dad lying lifeless on the floor with the sheet of paper stuffed in his mouth, and the letters YA written in his blood on his forehead. When will these fools realize that when they trifle with the minds of YA members they must pay the consequences!"