The fetus found outside a Toronto building where a murder-suicide occurred last December was a DNA match to Precious Charbonneau, the woman killed by her husband, a Canadian soldier, police said Tuesday.

Charbonneau, 33, was nine weeks pregnant when she was stabbed to death on the night of Dec. 20 and thrown from the 21st floor of the building, they said.

Police believe Robert Giblin, a 43-year-old sergeant who served with the Joint Task Force Central based out of Denison Armoury in Toronto, committed the crime. He then leapt to his death.

On Dec. 23, police confirmed a fetus had been found near the building, but said it didn't belong to Charbonneau.

But on Tuesday, they said "the results of DNA testing revealed that the fetus was a match to Precious Charbonneau."

In an interview with CBC News, Const. Craig Brister said "at the time it was potentially premature for us to come out and say they weren't connected.

"We weren't able to definitively connect the two at the time so it was headed up as a separate investigation," he said, adding that police received the DNA results on Monday.

He said the autopsy determined Charbonneau was pregnant "but the exact details of the pregnancy were inconclusive, that's why there were some gaps in the information that we had at the time."

Police could not explain why the fetus was found separately three days after the murder-suicide.

"There are a lot of unknowns in this, we don't have anyone to give us the information," Brister said. "Anything I say would be speculation."