Jurors in Christina Asp's murder trial received the chance last week to hear from a man who was not only best friends with Gordon Seybold but also considered himself a father figure to the woman now accused of killing him.

Asp is currently on trial in Yukon Supreme Court charged with first-degree murder.

Seybold's body was found after his Ibex Valley cabin burned to the ground in 2008.

Larry Brault, who was in a common-law relationship with Asp's mother, Jessie Asp, for six years, told the court he considered Christina Asp to be like a daughter to him.

Brault testified that he often had to act as both father and mother to the Asp children because of Jessie Asp's alcoholism.

Her dependency on alcohol made the older Asp hard to reason with at times, he said.

Brault testified that his best friend must have been aware of the problems but never spoke badly about Jessie Asp to him.

Police investigators have already told the court that they originally considered Jessie Asp a person of interest in Seybold's death after friends told them that the pair did not get along.

Brault said he and Jessie Asp were not together at the time of Seybold's death, though he did see the family periodically.

About two years before his death, Seybold invited Brault to move in to a second smaller cabin on his property.

The two friends, who had known each other since the 1980s, spent time together often smoking the marijuana Seybold grew and sold.

Brault testified that he sometimes helped with harvesting the plants.

He said he was not responsible for the grow-ops while Seybold, a frequent traveller, was on his last vacation to Asia before his death.

He insists he doesn't know who was.

During cross-examination, defence lawyer Ken Tessovitch suggested Brault knew who was caring for the plants but did not want to say.

Brault was one of the few trusted people with a key to Seybold's sauna, where drugs were sold on the honour system.

Jessie Asp did not have a key, Brault said.

When asked whether he had ever taken Christina Asp to Seybold's property, Brault said it was likely, although he could not remember specific times.

He testified that Jessie Asp was aware of the security system set up to protect his grow operations, including an alarm to alert him if anyone drove up to the property.

He said he never spoke to Christina Asp about the system.

Justice Leigh Gower is presiding over the case.