Defence lawyers in the murder trial of Margaret Lee Cole made their closing arguments on Thursday.

Defence lawyer John Dennis told members of the jury in a Barrie courtroom that Cole should not be found guilty of first-degree murder.

“This case is about a man dying in a house fire… the experts were unable to conclude it was arson,” Dennis said.

In April 2011, 82-year-old Richard Humble was pulled from his burning house in Washago and died hours later. Cole was Humble's caregiver. The Crown is accusing Cole of drugging Humble, setting his home on fire with him inside and then forging Humble's will and power of attorney documents.

On Wednesday, the Crown argued Cole was desperate for money after an insurance payout she received from her own home burning down ran out.

In a video shown to the juryduring the trial, Cole was questioned by police two weeks after Humble died.In it, Cole told police two friends witnessed Humble signing the new will, but the detective said police believed that wasn't the case.

"I already know the power of attorney and will was signed after his death, your witnesses have already given it up,” says OPP Det. Sgt. Scott Johnston. "We need to talk about this, we need to get this out in the open."

Cole didn't respond right away, but said, “Well I obviously need a lawyer.”

The detective tells Cole her friends admitted to police that Cole offered them $10,000 to lie. Cole denies that, but later admits to police that no one witnessed Humble signing the new will.

"We re-did the will and he signed it and had no witnesses and we should have gone into the lawyer and he didn't want to go and have it notarized."

The jury has also heard from witnesses, who testified seeing Cole’s car at Humble’s house the morning of the fire, but the defence argued if Cole wanted to set Humble's house on fire, it wouldn't have happened in broad day light.

"If one wanted to set a fire and be undetected, wouldn't it make more sense to do it at night," said Dennis.

During the trial, the court heard Cole had deposited $65,000 of Humble's money into her account the day before he died.

An expert has testified the will and power of attorney documents were forged and the defence admitted to the jury on Thursday there may be evidence to prove Cole forged those  documents, but argued she was not prepared to kill him.

The jury is expected to begin deliberations next week.