This father has a lot of explaining to do! Charges have been filed against Larry Madison from St. Louis who police say was smoking weed when his four-year-old son shot his younger brother—just three years old!

Madison is being charged with endangering the welfare of a child and possession of marijuana. 

The young boy was taken to the hospital with a graze wound after the shooting. No word on where the boy got the gun.  

SMH! This guy is the OPPOSITE of "Daddy of the Year"!

Source: KSDK