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Nobody deserves to die, but when you put yourself in bad spots, you increase your chances. This is not "pot's" fault. Nor is it the "gubmint's" fault for not legalizing. The quantity he was trying to buy or sell is not what even the Mass statute contemplates as legal.
He chose to engage in a criminal activity, meeting others involved in criminal activity, in a secluded area, and he either tried to rob the other guy or he got robbed. A fight ensued, one dipshit dead, one dipshit in jail.
There's little "innocence" on the part of either dipshit.
Pot was apparently a multi-generational endeavor, business or recreation in both families. But I don't think pot creates dipshits, dipshits are born and raised by dipshits and happen to also smoke pot. Non-dipshits also smoke pot and manage not to get themselves killed or refrain from killing someone along he way.
This is a 50/50 for me, once it went south, one of them was going to end up dead and the other one would be going to jail.
Senseless, but involving people with little to no sense.