Possession of Cannabis-Infused Drinks

My question involves criminal law for the state of: Ohio

A friend of mine was recently arrested for possession of marijuana, including 3 gummy edibles and a weed-infused drink. He only had edibles and in a tiny amount (he said a total of 3 grams). The drink was purchased in Colorado, and is infused with 200mg of THC. When he was arrested, he was told that the possession of the drink constitutes a felony, even though it has the same amount of drug that the gummies do. I was reading up on the laws of possession in ohio, and I'm having trouble understanding this. It seems that there's a distinction between drug and compound.. ie. if you got caught with a handle of vodka with and 1/8th of weed in it, you wouldn't be charged for the weight of the vodka, but I'm not really sure about this.

http://codes.ohio.gov/orc/2925.11

This is what I'm reading from. He's getting a lawyer obviously, but I'm curious as to how this could turn out for him.

Questions:
Will he be charged for the liquid in the infused drink?
How thorough is the testing of these liquids, especially if they are labeled, unopened, and have labeled THC content? I was reading that the quality control on these substances is really spotty, so there's a chance that if tested it could have more or less THC than labeled. But does the fact that it's labeled help his case?
Other information: He's a college aged white kid with a spotless record. He was arrested during a routine traffic stop for wearing headphones, and he was completely sober at the time.

Does your buddy know you just posted on the internet about how guilty he is for a felony? A white kid? Really? So you are also a racist. Nice. Why does his race matter to anyone here yet you had to bring it up. He is a criminal. Apparently a felon. Maybe he can get intervention in lieu of conviction. If he is a really good boy, he won't have a felony. Unless he tests positive in the next year.

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Quoting elemmeur

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Will he be charged for the liquid in the infused drink?

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You've already read the statute, so you know that the prosecution can be based upon the mass of a mixture containing the controlled substance.

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Quoting elemmeur

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How thorough is the testing of these liquids, especially if they are labeled, unopened, and have labeled THC content?

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Police crime labs test marijuana as a matter of routine.

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Quoting elemmeur

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But does the fact that it's labeled help his case?

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No.

So if they're just taking the weight of the whole compound, why go to the trouble of testing it? all that trouble just for confirmation?

Very obviously, they don't know what the mixture contains until they test it.