Nel: Pistorius was arguing with Steenkamp

Gerrie Nel says Oscar Pistorius's screams were in fact directed at Reeva Steenkamp.

State prosecutor Gerrie Nel. Picture: Pool.

PRETORIA - State prosecutor Gerrie 'bull terrier' Nel has revealed more of the state's case of how it believes murder accused Oscar Pistorius and Reeva Steenkamp were involved in a heated exchange before he shot and killed her.

Picture: Carte Blanche.

The details emerged under cross-examination in the North Gauteng High Court yesterday, where the athlete faced up to several improbabilities in his story, but could often provide explanation to tough questions.

Pistorius said he shot his girlfriend by accident, but the state has continued its assault on his version as it attempts to prove a case of murder.

Video: Pistorius's version improbable.

Nel said Pistorius's screams for the perceived intruders to get out of his house were in fact directed at Steenkamp.

Picture: Pool.

He questioned why, based on the ballistics showing Steenkamp's position, his girlfriend would be standing upright on the other side of the toilet door.

"I don't know my lady."

"Because she was talking to you sir."

"That's not true my lady."

"All the screams and shouts were directed at her and she fled for her life."

The 'bull terrier' dismissed the athlete's claim he believed there was an intruder behind the door and that he pulled the trigger by accident.

"These other versions cannot be true because you fired at her."

"I did not fire at Reeva," said Pistorius.

The prosecutor questioned the athlete's apparent change in defence, from putative self-defence to involuntary action.

NEL CONTINUES TO PUNCH HOLES IN PISTORIUS'S TESTIMONY

Nel argued that Pistorius opened fire at the toilet door even though there was no imminent danger.

Picture: Pool.

Photographs have been scrutinised, the position of certain items in the bedroom were questioned and the athlete's actions at the time have been measured against what a reasonable man would do.

The athlete told the court he had a clear view of the bathroom door handle, and even though it didn't move, a sound inside the cubicle made him fire four shots in quick succession.

The prosecutor pointed out that he first claimed that he fired in self-defence and out of fear, believing an intruder was about to attack him.

Pistorius then testified that it was an accident and he had no time to think.

Nel says he was thinking clearly because he admitted that firing a warning shot into the shower could have caused a bullet to ricochet and hit him.

Video: Pistorius knew Steenkamp was behind the door.

Pistorius has also admitted that he was trained to go into 'combat mode' yet opened fire without giving the 'intruders' a chance to escape or warning them that he was armed.

Picture: Sky.

NEL ACCUSES PISTORIUS OF 'EMOTIONAL ESCAPE '

Nel on Monday accused Pistorius of creating events that never happened and of using his emotional state as "an escape".

The prosecutor forced him to account for every decision and action he took on the day in question.

The sportsman broke down several times and was accused of changing the heart of his defence.

Judge Thokozile Masipa had to step in several times to shield Pistorius from Nel's relentless questioning.

But the prosecutor defended his line of questioning, accusing the Olympian and Paralympian of making up his version.

Get all the latest on the EWN Pistorius trial.