Deaths Caused by Monster Energy Drinks

http://www.examiner.com/article/monster-energy-drink-cited-five-deaths-popular-teen-beverage-investigated

This does not correlate with teenage consuming alcohol, but with the concern of the death of a 14 year old female it becomes relevant to bring up. The female consumed two 24 ounce cans of Monster Energy in a two day period and her cause of death was heart arrhythmia due too an overdose of caffeine.

I do enjoy an energy drink every now and then to wake me up before I go out or start studying, but when someone dies because of them t really opens my eyes. The question I ask is who is to blame?