4:00 PM PT -- The Morris County District Attorney's office announced they've charged Barisone with 2 counts of attempted murder ... as well as 2 counts of unlawful possession of a weapon.
The D.A. says cops responded to the equestrian center after receiving a 911 call and "located one female who had sustained what appeared to be multiple gunshot wounds."
"The Defendant, Michael Barisone, and a second male victim were also located at the scene. A handgun was also recovered."
Ex-U.S. Olympian Michael Barisone -- who competed in Dressage in the 2008 Olympics -- allegedly shot a woman at his upscale equestrian center in Jersey, according to reports.