Is there any proof that he was buying blunts? Why not just say he was buying tactical nukes and bioweapons to kill every person in the United States? As long a no proof is required.
Is there any proof that he was buying blunts?
Yes, it came out in testimony, he was buying cheap cigars and they found MJ in his blood.
In the 7-11 video, he is seen asking the cashier for something behind the counter and is refused. He walks out, then a minute or two later, another guy comes in and buys a couple of blunts and walks back out. That, along with his history of pot usage, makes a strong case that he got someone hanging outside the store to buy blunts for him.