Chilling CCTV shows a 32-year-old man with his French film producer ex-girlfriend before he strangled her and buried her in a shallow grave.
Barman Kirill Belorusov borrowed thousands of pounds from Laureline Garcia-Bertaux, 34, under the pretence that he was buying a new home for them to live in.
In reality there was no home, and unable to keep the lie going any longer, Belorusov took her life, in Kew, London.
In one clip, Belorusov can be seen having holding hands with Ms Garcia Bertaux while the pair travel on a bus on March 1, two days before he killed her.
In another, he was filmed leaving Homebase with the tools he would use to try to hide her body in a shallow grave.
Ms Garcia-Bertaux was found naked, bound and wrapped in bin bags in a flower bed in her garden a day after friends reported her missing on March 5.
Belorusov was convicted of Ms Garcia-Bertaux’s murder yesterday at The Old Bailey.
The court heard of the web of deceit he spun for his victim, including that he had worked as Brad Pitt’s stuntman in World War Z.
Belorusov had sent text messages from Ms Garcia-Bertaux's phone to her friends in a bid to cover his tracks before fleeing to Estonia.
He denied murder after being arrested in the capital, Tallinn, under an European arrest warrant and brought back to the UK.
But a jury of seven women and five men found him guilty at the Old Bailey on Monday after deliberating for less than two hours.
Belorusov, wearing a dark blue suit and open-collared white shirt, closed his eyes and nodded at the jury as the verdict was delivered. He will be sentenced on Friday.
Prosecutor Oliver Glasgow QC said: "The last few minutes of Ms Garcia-Bertaux's life must have been truly terrifying as this defendant squeezed the very life out of her, and as she struggled for her final breath, there must have been a moment of terrible clarity when she realised that the man she cared for was a liar, a cheat and a killer.
"Her death was not the work of a panicked moment of anger or the frantic result of a heated row.
"The killing itself was the work of three to four long slow minutes in which he calmly and methodically killed the woman he claimed to have cared for and then went shopping for the items he needed to help him dispose of her body."
