Former Missouri football standout Aldon Smith, currently on indefinite leave from the NFL while undergoing treatment for substance abuse, was charged with three felony counts of illegal possession of an assault weapon, from a party at his home in June of 2012.

The Santa Clara County district attorney’s office said Smith is expected to turn himself in later this month. The 24-year old, who set a San Francisco 49ers record with 19.5 sacks, could face up to four years in jail if convicted. Much less of a concern, once Smith’s legal troubles are decided, he’s also likely to face a suspension from the NFL.