The investigating officer has challenged Oscar Pistorius' account because of the angle of several shots fired in the athlete's bathroom.
In an affidavit given on Tuesday, Pistorius said he woke in the night and thought an intruder had climbed through his bathroom window and entered the adjoining toilet.
He said he went into the bathroom without his prostheses and fired at the locked toilet door, believing the intruder to be inside.
But investigating officer Hilton Botha said the "top to bottom" trajectory of the bullets suggest Pistorius was wearing his prostheses.
He also said the angle of the shots suggests they were aimed at someone sitting on the toilet.
More top news
In an embarrassing setback for the president, Republicans failed to reach the number of votes to pass his new healthcare act into law.
It will feel pleasantly warm in the sunshine, with temperatures reaching 12 or 13 Celsius (54 to 55F).
Some of Britain's biggest stars of the stage and screen will be honoured at Buckingham Palace later today.