Study shows energy drinks may "lead to cocaine use"...
https://www.usatoday.com/story/money/2017/08/11/energy-drink-consumption-may-lead-cocaine-use-study/560212001/
Then there is this one, "Energy drinks cost father part of his skull"
http://www.foxnews.com/lifestyle/2017/10/13/energy-drinks-cost-new-father-part-his-skull-wife-claims.html
The key IMO on both of these is proper use vs abuse... as it is with pretty much everything. Hell, even too much water can kill a person.