Blood found on a vehicle's floor mat has been linked to a man whose body was discovered in the charred remains of his Ibex Valley home in 2008.

Though he doesn't use the term "match,” a DNA specialist hired to analyze blood samples collected by police says there is a one in 7.5 trillion chance the blood belongs to anyone other than Gordon Seybold.

Martin Westecott testified Monday at the first-degree murder trial of Christina Asp.

She stands accused of killing Seybold alongside her then-boyfriend, Norman Larue.

Larue is also facing a murder charge in the case and is expected to go to trial later this year.

Westecott is the supervisor at the laboratory, where the RCMP sent multiple blood samples to be analyzed.

He testified that two spots on a vehicle's passenger side, front floor mat tested positive for blood.

The jury of 12 women and two men has already heard the RCMP seized a GMC Jimmy belonging to Asp's mother.

The first blood spot contained DNA linked to Seybold as well as a second DNA sample that was too small to be tested, Westecott told the court.

The second blood spot also contained male DNA, but it was not Seybold's.

The lab was able to exclude a series of other males, including Larue, as possible sources.

Officials still don't know who that DNA belongs to, Westecott said.

Again, a second smaller DNA sample was found in this blood spot but it was too small to analyze.

The inner handle of the vehicle's driver side door also tested positive for blood although none was visible, the court heard.

Westecott testified the handle contained a mix of DNA from at least three individuals, but his lab was unable to draw any conclusions as to who the blood belonged to.

Aside from in the vehicle, technicians also linked Seybold's DNA to blood off a bat and rifle collected from a rest stop dumpster about 12 kilometres from his property.

During cross-examination, Westecott told Asp's lawyer, Ken Tessovitch, that there was no way to tell which DNA sample found in each sample came first.

It was also not possible to say how long the blood had been there except to say it would have happened after the car's last cleaning.

The lawyer also questioned how much the lab knew about the case when police first gave samples of Seybold's DNA to test against the blood they discovered.

Westecott said he knew that the "known sample” belonged to a deceased person.

Tessovitch asked if knowing that could be a problem, adding it was the RCMP who paid his lab to do the analysis.

Westecott said he has no vested interest in how the results turn out and has no way of manipulating a sample he is given.

He said mistakes can happen, but his company does everything it can to reduce that risk.

The case, which continued today, is being heard in front of Yukon Supreme Court Justice Leigh Gower.