Simone Biles says her "heart aches" for everyone involved in the horrific triple murder that her brother allegedly committed -- saying, "There is nothing that I can say that will heal anyone's pain."
The Team USA gymnastics superstar's brother, Tevin Biles-Thomas, is facing murder charges for the Dec. 31 shooting in Cleveland, which left 3 dead.
Cops the shooting broke out during a fight at a house party at an Airbnb rental in Cleveland -- and say they have identified 24-year-old Biles-Thomas as the shooter. After an investigation, he was arrested on Friday.