I hope that the feds go lenient with this young man.
But 'how could this happen'?  Well, in the new 'anything pot goes'  -----
Portland's law has been broken.

Smoke all the dope you're craving in most of Oregon if you are 21.  

The law of over 21 partially considers the scientific findings that young men's brains are still forming until the mid-20s even.