He didn't accuse the police of lying but I do.
I've been there when it happened and was a sworn law enforcement officer at the time. They routinely overestimate the amount, potency and street-value (especially street value) to look good to the higher-ups for evaluation.
One of my first experiences with the "prohibit it if someone's enjoying it" crowd happened during my first year as a rookie patrolman. We were dispatched to a duplex where the complainant was an older lady who lived alone and it was against her neighbor who lived in the other half of the duplex.
She actually requested us to listen to how quiet the neighbor was....not a sound coming from his side of the building. Because he was quiet, she was just certain that he had consumed the entire six-pack of beer she had seen him carry in earlier in the evening and the silence was because he was intoxicated (in his own home) and MUST be arrested for it.
When we told her there was nothing illegal about it and nothing we could do about it, she called the lieutenant and complained about it after we left.
Don't project your dishonesty on real officers.