A KNIFE maniac who slaughtered his estranged wife and step-daughter ranted jealously online before their deaths, it’s emerged.
Steven Robertson, 40, posted a sinister video and message on Facebook before he stabbed hospital worker Emma Robertson, 39, to death.
Twenty minutes after committing the horror in Kilmarnock, south of Glasgow, he stabbed Emma’s daughter Nicole Anderson, 24, as she worked as a takeaway delivery driver.
Robertson then died as he crashed his car into a tree around 13 miles away.
Cops are linking the horrifying incidents, all of which happened in Ayrshire between 7.56pm and 8.30pm last night.
Social media posts from a now-deleted Facebook page show Robertson’s twisted state of mind towards his estranged wife.
He shared three kids with Emma and was also step-dad to tragic Nicole.
A video emerged of Robertson in a foul-mouthed diatribe against his ex while walking around a flat undergoing major renovation.
He says: “Some mess man. Is this my life? No, this is not my life.
“F*** off man. I hate ye, I don’t want anything to do with you.
“Honestly. I don’t even want to see my [kids] because of you.
“I know everything about you.
“Get to f*** out of my life.”
In a second post, he makes further slurs and allegations against Emma and blames her for apparently turning the youngsters against him.
He wrote: “Well, well, well.
“I never thought you would turn the kids away from me, but remember Emma Robertson, all your lies wrecked the family.
“So I’ll not need a phone any more.
“I never in my life, after 20 years together, thought you would do this.”
And he appeared to suggest friends wouldn’t be able to contact him after posting the sick slurs online.
He said: ‘‘You keep saying what you want because I don’t care anymore.
“The right people know the truth, that’s all that matters to me.
“And thanks for all the people who told me stuff.
“There are some right good people out there.
“I am closing my Facebook for good and I am not going to have a phone because I don’t need one anymore.”
It’s understood Robertson and Emma were together for around 20 years.
The devoted mum’s Facebook page is littered with happy photos from family holidays – including a trip to Florida in October 2019.
Another shows the family – including Nicole – dressed up for a wedding in 2014.
But in recent times it’s understood the couple experienced difficulties and were living apart.
Nicole worked at the Spicy Cube as a delivery driver.
Owners of the takeaway paid tribute to the “loveliest lassie”.
Bosses said it would remain closed as a sign of respect to the slain delivery driver.
They said: “Still can’t believe what’s happened, hard to take in.
“Loveliest lassie you could ever meet and one person who cheered the shop right up.
“Rest in peace Nicole Anderson. You’re sadly missed.”
Customers also told of their shock at her horrific death.
One wrote: “Absolutely devastating and heartbreaking.”
Another added: “Always delivered our food with a smile on her face. Will be sadly missed.”
The vehicle thought to have been driven by Robertson could be seen on a remote section of a rural road last night.
It had come to a halt at the side of the road opposite a farm house. Cops had put a large green cover over the motor.
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A police van was parked across the road a around a hundred yards away from the crash scene.
Cops confirmed they were not chasing Robertson and say it’s unclear how the crash happened.
Ten officers in white forensic suits were seen approaching the abandoned motor from the A76 side of the road as they probed the grim scene for clues.