WA's Supreme Court has been shown footage of barrister Lloyd Rayney refusing to answer police questions about his wife's murder on the same day he was publicly named as the prime and only suspect in the case.

The seven-minute video, recorded on September 20, 2007, was played during Mr Rayney's sixth day of testimony at his multi-million-dollar defamation case against the state of WA.

It is believed the footage had not been aired publicly before. It shows Mr Rayney repeatedly telling two police officers that he had been advised by his lawyer not to be recorded on video and not to answer their questions.

Mr Rayney refused to state his name for the record and when asked if he was involved in the death of his wife he replied, "How many times do you wish me to give the same answer?"

He was then asked if there was anything he could tell the officers about the death of Corryn Rayney, but he gave no answer.

When asked if had any complaints about his treatment he said he was told by police he was "compelled" to be in the room, but on camera they said he did not have to be there.

"I'll let my lawyer know about this," he said.

The interview was recorded about 2.00pm, approximately an hour before Detective Senior Sergeant Jack Lee told a packed media conference, Mr Rayney was the "prime" and "only" suspect in the murder case.

Mr Rayney always denied any involvement in his wife's death and in 2012 was found not guilty of her murder.

Police comments 'finished' Rayney's prospects, court told

Earlier Mr Rayney told the Supreme Court his reputation was "well and truly destroyed" by the police comments, which he said changed his life and his career.

He said they "finished" his prospects in the legal profession, and although recently he had been able to get work, it was not like the work he had before September 2007.

"The type of clients I attracted after that time were not the same as before," he said.

He was quizzed about a range of unfavourable findings made against him in various court judgements since 2007, but dismissed the suggestion it was those decisions and not Senior Sergeant Lee's comments that had "devastated" his career as a lawyer.

"A man is dead, someone comes along and shoots a bullet in him. It doesn't matter the man is dead," he said.

Court hears audio of couple arguing

During Tuesday's proceedings the court was played another recording of an exchange between Mr Rayney and his wife in early 2007, which he claims was made with her consent.

He testified the recording was made using a hand-held dictaphone which was kept in view of Mrs Rayney.

The couple are heard arguing about a male parent at their daughters' school, with whom Mr Rayney suspected his wife had been unfaithful.

While that was not the subject of the argument, Mr Rayney is heard saying the man had abused him in front of one their daughters and other parents at the school.

Mrs Rayney is heard defending the man, telling her husband he was "talking rubbish" and that he had insulted the man and treated him badly.

The court has heard Mr Rayney suspected his wife had been unfaithful to him with the man, but she had denied it.

However, Mr Rayney said he "learned of Corryn's unfaithfulness after her death" when he read a statement from the man.

Mr Rayney, who has also been accused of having an affair during his marriage, has today completed his evidence.

The hearing will resume on Wednesday with new witnesses.