The Oscar Pistorius murder trial continues in a South African court.

Wielding a cricket bat, a police forensic expert said Pistorius was likely on his stumps when he smashed down a locked toilet door to reach his shot girlfriend.

Police colonel Johannes Vermeulen said the angle of the marks on the door, and on the bat, could only have been made by someone much shorter than him - standing without his prosthetics.

(SOUNDBITE) (English) WITNESS FROM THE SCIENTIFIC ANALYSIS UNIT OF THE POLICE'S FORENSIC DEPARTMENT, COLONEL JOHANNES GERHARD VERMEULEN, SAYING:

"I just mention it as a side note to him that the marks on the door is actually consistent with him not having his legs on. I suspect it must be similar to the, to the height he was when he fired the shots."

But Pistorius claims he was wearing them at the time.

Pistorius is charged with the murder of his model girlfriend Reeva Steenkamp. He shot her through a locked toilet door on Valentine's Day las