The three-week trial, which hinged on the question of whether Millane was deliberately slain or if her death in Auckland, New Zealand, was a tragic accident that occurred during a night of rough sex, prompted intense reactions from people who objected to the focus on the victim's sexual history, and the sensational tabloid stories that ensued.
The 21-year-old visited numerous places in Chile and Peru that her mother, Gillian Millane, herself visited as a young woman.
He even went on a Tinder date with another woman the next day while Millane's body was stuffed in a suitcase in his hotel room, McCoubrey said.
A general view of Auckland High Court in New Zealand during the trial.
"Grace was our sunshine and she will be missed forever", the paper quoted her father as saying outside the court.
"This will be with us for the rest of our lives", her father, David Millane, told reporters.
"It will not reduce the pain the suffering that we have had to endure over the past year".
Grace Millane was on her OE in New Zealand when she died. "She did not deserve to be murdered in such a barbaric way during her gap year".
Ms Millane was killed on her birthday in December 2018 after meeting the man through the dating app Tinder, going out for drinks with him, and then returning to his hotel apartment in central Auckland.
But his defence team claimed Millane died after encouraging him to choke her during consensual sex, then he disposed of the body and cleaned up the death scene because he was in a panic.
After hearing from almost 39 witnesses over almost three weeks they were presented with two different narratives about what happened to Millane on that fateful night.
The 27-year-old defendant, who can not be named for legal reasons, is expected to be sentenced on 21 February over the death. Police found her body on December 9 in bushland just a few meters from a scenic drive in the Waitakere Ranges. "Finally, we must return home and try and pick up the pieces of our lives on a day-to-day without our beloved Grace".
Earlier today Justice Moore provided his closing remarks and directions to the jury. "This has been a particularly hard trial".
A forensic pathologist, who testified for the prosecution, said it would have taken about five to 10 minutes for Millane to have died from choking and noted that before dying she would have passed out first.
The judge thanked the jurors for their service in what he called a particularly hard case.
The man's lawyer, Ian Brookie, could not be reached for comment.
The murderer, who still can not be named, walks into the dock during his High Court trial.
Justice Moore told the jury that "when he applied pressure" wasn't limited to the beginning of this time period and it could be at any time during the application for force leading to Ms Millane's death.