Police have still not confirmed that Randy Janzen killed his wife, sister and 19-year-old daughter, Emily, but say they are aware of a post on Janzen's Facebook page saying his daughter was shot to end her suffering.
The post goes on to say Janzen wife was shot so she didn't have to live with her daughter's death or the shame of what he had done.
Investigators say they cannot confirm how many victims might be in the charred house near Chilliwack, east of Vancouver, or at a second crime scene in Langley, where at least one person was found dead.
However, they believe the dead are all from one family and the suspect is among them.
A Facebook post from a man, identified as Randy Janzen, contains an apparent confession to the murders of Janzen's daughter, wife and sister.
The CBC cannot confirm whether Janzen actually wrote the message.
It begins by saying: "Over the last 10 days I have done some of the worst things I could have ever imagined a person doing."
The post goes on to detail how his daughter, Emily, had suffered since elementary school from migraines that made her "very ill" and had pushed her into a severe depression.
"I took a gun and shot her in the head and now she is migraine-free and floating in the clouds on a sunny afternoon, her long beautiful brown hair flowing in the breeze, a true angel," the post says.
The post says the man shot his wife "because a mother should never have to hear the news her baby has died" and, "a couple of days later," killed his sister "because I did not want her to have to live with this shame I have caused all alone."
"Now my family is pain free and in heaven," it concludes. "I have great remorse for my actions and feel like the dirt that I am."
The post is signed "Love Daddio."
Police said they are aware of the Facebook message and it is part of their investigation.
In April 2014, a Facebook post under Emily Janzen's name said she had just been accepted into the University of British Columbia's opera performance program. Late last month, she tweeted how thankful she was to be alive.
Last October, she posted a photo of herself on Facebook.
"Emily you are awesome," her father commented.
"Love ya daddio," she responded.
The burned out house sits on a quiet suburban street of large family homes and beautiful lawns with mountains in the distance. All that remained Friday was a scorched shell with the roof mostly collapsed.
Neighbours said there was a police standoff at the home Thursday night before a fire broke out in the home.
Co-worker says Janzen was a 'a funny guy'
Raymond Norfolk, who identified himself as a co-worker of Randy Janzen at a sawmill, solemnly laid a bouquet of flowers by a tree near the house.
He said that although he had never met Emily Janzen, he felt like he had grown to know her over the eight years he worked alongside her father because he talked about her constantly.
"It's brutal. I can't believe it. Randy was a good buddy, and now he's gone," he said after police held a news conference and confirmed the Facebook post was part of the investigation.
"I left work today. Honestly, when I heard about it I started crying. I had to go home and see my little girls, because it was too much."
Norfolk said the man described his daughter as a "lucky, go-getting girl — all up until the migraines."
He said her pain began as a child but grew so much worse in recent years that she began getting morphine shots.
His daughter's health problems took a toll on the man, Norfolk said.
"He was a funny guy, but he was a rollercoaster too. He was depressed, and then one minute he was up. And then he was down.
"She was the world (to Janzen)," he said, before adding he'd heard his co-worker make some unusual statements.
"He kind of talked about it. If she ever goes, he's done. 'Why bother being here? There's nothing left in my life."'