Caffeine = Weapon??

A couple weeks ago I was reading CNN and saw an article about a man who was claiming temporary insanity based on the amount of caffeine he had consumed in a specific amount of time.  Puh-lease.  This might be a strong opinion for a potentially public platform, but I am willing to call B-S on that, especially considering the reason he kept knocking-back pop, pills, energy drinks, whatever : he was trying to stay awake through the night, convinced the second he went to sleep his wife would leave him for the gentleman with whom she was having an affair.  What do you think the real cause of this murder is?  The caffeine or the premeditated attempt to control a failed relationship in whatever way possible?

As a frequent consumer of caffeine, maybe I should be a key witness?