The vital question may linger forever: Did Oscar Pistorius know he was shooting at his girlfriend?

In the decade since Oscar Pistorius pulled the trigger four times on his 9mm pistol, firing into the head and body of girlfriend Reeva Steenkamp as she stood inside a locked toilet cubicle in his home, the vital question has still never been answered: Did the world-famous Olympic runner know he was shooting at and killing his girlfriend that Valentine's Day in 2013?