Very likely. I would guess a combo of Prescription Amphetamines or Anti-Depressants. Of course if the Police drug test the boys and find any small amount of Marijuana in their systems that will be blamed.
Both boys are of the times. Brought up in an age of moral ambiguity. No discernment or judgement and absolutely no fear of any post mortem reward or retribution. Anything goes. We must judge. We must discern. We must discriminate. And toleration should never extend to tolerating the venal, the wicked, and the evil. And for what did they commit murder? Money for a pizza! Madness!