IT is day 19 of the trial of former Brookfield real estate agent Gerard Baden-Clay, 43, who stands accused of murdering his wife Allison Baden-Clay, 43, on April 19, 2012.

Baden-Clay has pleaded not guilty in the Supreme Court in Brisbane.

4.24pm: The jury in the trial of Gerard Baden-Clay has not reached a verdict, after deliberating for almost 12 hours.

It will return to the Supreme Court at Brisbane to continue its deliberations on Monday.

Baden-Clay, 43, has pleaded not guilty to the murder of his wife Allison on April 19, 2012.

Justice John Byrne asked the jury to retire to consider a verdict on Thursday at 11.10am.

The trial will continue on Monday.

A jury of seven men and five women yesterday retired to consider a verdict at 11.10am.

It deliberated for five hours before returning to the jury room again today at 9.30am.

Justice John Byrne asked the jury to re-enter the court room at 10.10am.

In response to a note from the jury, Justice Byrne took them through sections of his summing up.

The jury speaker said he was not able to identify the passage the jury wanted more information on, instead referring a question from Justice Byrne to another panel member.

The juror identified the section as being to do with the evidence of Baden-Clay and whether he told lies.

Justice Byrne reread the passage to the jury.

“If you conclude that the accused lied because he realised that the truth would implicate him in killing his wife, you would need carefully also to consider whether the lie reveals a consciousness of guilt merely with respect to manslaughter as distinct from also revealing an intention to kill or to cause grievous bodily harm,” he said.

“You may only use the lie about cutting himself shaving – if it is a lie – as tending to prove the element of murder of an intention to kill or to cause grievous bodily harm if, on the whole of the evidence, the accused lied because he realised that the truth of the matter in that respect would show that, in killing his wife, he had intended to kill her or to cause her grievous bodily harm.

“It may be that, even if you were to find that the accused lied about his facial injuries because he realised that the truth would show him to be the killer, still you would not conclude that the lie shows that he realised that her death after scratching him with her fingernails would show that he had killed her intentionally.”

The jury retired again to consider its verdict.

Yesterday, the judge warned the jury in the trial of Gerard Baden-Clay they should not seek outside help after a juror downloaded instructions on how to decide a verdict off the internet.

The former Brookfield real estate agent, 43, has pleaded not guilty in the Supreme Court at Brisbane to the murder of his wife Allison Baden-Clay and to dumping her body 13km away at the Kholo Creek bridge at Anstead on April 19, 2012.

A jury of five women and seven men retired yesterday at 11.10am to consider a verdict in the five-week murder trial.

ROLLING COVERAGE: How the trial unfolded yesterday

Justice John Byrne asked the jury to return to the court just two hours into the deliberations. He told the jury he had warned them three times not to inquire outside the courtroom about anything related to the trial.

Justice Byrne said a juror had apparently downloaded overseas material on how a jury might approach its “great responsibility of deliberating on a verdict”. He thanked the jury for bringing the matter to his attention.

“Now everyone appreciates a juror’s job is rarely easy and we all understand jurors are often anxious about performing their role,” he said.

“They want to do it well and responsibly … and will look for assistance, but I repeat, that assistance must come from the court and only from the court and not some external source.”

Justice Byrne told the jury they had available to them in the jury room a court-approved guide to deliberating on their verdict. He told the jury the document would be retained by his associate, before reminding the jury a fourth time not to make outside inquiries.

“You must not use any aid, such as a textbook to conduct research, and except in this courtroom you must not in any way seek or receive information about questions that arise in the trial or about the accused, or about any witnesses or the deceased, for example, by conducting research using the internet, or by communicating with someone by phone, email or Twitter, through any blog or website, including social networking websites such as Facebook, LinkedIn and YouTube,” he said.

The jury will continue deliberations today after late yesterday seeking clarification on the difference between murder and manslaughter.

Crown prosecutor Todd Fuller, QC, argued Baden-Clay had murdered his wife under pressure from her, his business, his mistress and wanting to “wipe the slate clean”.

Defence barrister Michael Byrne, QC, contended Baden-Clay did not murder his wife and it was possible she died of drowning, falling, alcohol or antidepressant toxicity or that she suffered “serotonin syndrome”.

Follow the trial of the year day-by-day here:

DAY 16: ‘It was an efficient, effective killing’

DAY 15: ‘She can’t sleep, she’s up alone, what if ...’

DAY 14: ‘You killed your wife.’ ‘No, I did not.’

DAY 13: Allison’s journal ‘untrue’, says Baden-Clay

DAY 12: Baden-Clay’s love triangle email trail

DAY 11: Baden-Clay’s tears as he takes the stand

DAY 10: How it unfolded as the Crown rests

DAY 9: Plants on Allison found at her home

DAY 8: Jurors inspect site where body found

DAY 7: Neighbour’s explanation for scream

DAY 6: Scratches not typical of razor

DAY 5: Listen to triple-0 call to police

DAY 4: Accused told lover to lie low

DAY 3: Neighbours heard screams

DAY 2: Daughter’s tape brings tears

DAY 1: Photo shock in murder trial