He'll probably get charged with having a gun while under age,
Correct
In Wisconsin you must be 18 to possess a gun.
Furthermore, sale, loan, or lend of a firearm to individuals under the age of eighteen is punishable by a Class I felony, carrying a maximum sentence of 42 months incarceration and fines of no more than $10,000.
Dad might have his nut in the ringer too.
It's these week-end warriors that are destroying responsible gun owners gun rights and freedoms.
Strzelec35 is 100% correct......"he went out of his way hoping for a confrontation and got one."
Plus he was drunk and stoned while in possession of a firearm which is serious jail time.
He is screwed, no doubt about that.