So, the BG come in to buy some pot, transaction complete, he lets in his buddies. Buddies and him gather up all the pot, and one of the BG's shoots another, oops. So he gets taken to the hospital... and they arrest him...

They probably got the dealers, too.
"Uh...Officer, they came here to buy some of my great doobie, and they robbed us!"

And they'll probably get the other 2 BGs.
"My homies shot me, man! Arrest them, I been shot!"

Stupid drug activity...

Story here