CBC News Ottawa has exclusive new details about how Ontario's probation system managed one of the worst domestic violence offenders in Canadian history before he murdered three women in and around Renfrew County.

“Target met: 95% - 100%.”

That’s the score a manager gave Basil Borutski’s probation officer, two days after Borutski murdered two ex-partners he was on probation for abusing — Anastasia Kuzyk and Nathalie Warmerdam — as well as Carol Culleton on Sept. 22, 2015.

For nearly three years leading up to the slayings in the Ottawa Valley, Borutski’s probation officers in Renfrew and Pembroke, Ont., were tasked with making sure the repeat domestic violence offender followed court orders after serving jail time for threatening Warmerdam’s family, and choking and assaulting Kuzyk.

They were also responsible for liaising with partner agencies including victim advocate organizations, police and the Crown to help keep Kuzyk, Warmerdam and Borutski’s ex-wife safe. (CBC News is not naming his ex-wife because she was a victim of intimate partner violence and is still living.)

A few weeks after the local manager’s “target met” assessment, a death review conducted by probation and parole managers elsewhere in Ontario found that multiple opportunities for probation officers to intervene had been missed .

But two days after the murders, as headlines were still blasting the news of one of the worst instances of intimate partner violence in Canadian history, the only thing the local manager felt needed to be addressed was that Kuzyk should have been contacted monthly.

The "target met" score is the highest that can be given.

From left to right, Nathalie Warmerdam, Anastasia Kuzyk and Carol Culleton were murdered at their homes and cottages in and around Renfrew County a decade ago, on Sept. 22, 2015. (CBC News)

“It's just baffling, honestly,” said one of Warmerdam’s sons, Malcolm, in an interview at his home.

Kirsten Mercer, a lawyer who represented victim advocacy groups at a 2022 inquest into the murders, was also dismayed.

“If you can look at the events that unfolded in Renfrew County and say, 'Yeah, we did just about everything right here,' you are clearly measuring the wrong thi