No, you can be be popped for just use, depending on how the law is written in the state/jurisdiction the use occurs in. To wit, my state law specifically prohibits someone to "possess OR use a narcotic drug" (emphasis added). I honestly could not tell you how frequently they pop people just for using drugs. It might be rare. I would imagine possession is more common thing that trips people up.
It's a pointless thing to discuss in this thread though IMO, because he's being charged with possession. The cokestream is something to laugh at (or be horrified at, YMMV), and it was one of the things the cops relied on to get the warrant, but him actually using the coke isn't a necessary element of the crimes he's currently charged with.