The boat crash that killed Miami Marlins pitcher Jose Fernandez and 2 other men is now a homicide investigation -- as officials believe the person who was driving the boat was boozed up.
TMZ Sports has obtained the search warrant affidavit into the Sept. 25th incident -- in which investigators say all three bodies pulled from the water "had a strong odor of alcohol emanating from them."
Investigators also say the crash scene is consistent with a high speed collision -- and the "recklessness" of the driver "was exacerbated by the consumption of alcohol."
Investigators have not named the person they believe was driving the boat -- but whoever it was is now suspected of Boating Under the Influence and Vessel Homicide.