Hoax collar bomber Paul Douglas Peters has lost his bid to have his minimum 10-year jail term cut.
The NSW Court of Criminal Appeal on Friday dismissed his appeal against the severity of his sentence for attaching a fake collar bomb to the neck of Sydney schoolgirl Madeleine Pulver.
He had appealed against his maximum 13-and-a-half year sentence on several grounds, including that the sentencing judge didn't take his mental illness into account.
Ms Pulver's terrifying ordeal made world headlines after Peters entered her parents' Mosman home on August 3, 2011, and attached the device to the then 18-year-old's neck.
The device had a USB stick and ransom note attached, warning that tampering with it would make it explode.
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Ms Pulver was attached to the device for 10 hours before it was found to be a fake.
After he was extradited from the US, Peters pleaded guilty to aggravated breaking and entering and detaining with advantage.
He never gave evidence or explained why he targeted Ms Pulver.
He claimed he had no memory of attaching the device to his neck and the court heard he suffered from severe depression and bipolar disorder.
His memory loss claim was rejected by the Crown, which submitted Peters simply entered the wrong home during an extortion attempt.
Sentencing Peters in the District Court last year, Judge Peter Zahra said the fear Peters instilled in Ms Pulver could only be described as unimaginable.
"He would have appreciated the enormity of what he was doing and the terrible effect and consequences of his actions on the victim," Judge Zahra said.
Peters will be eligible for parole in August 2021.
Ms Pulver and her family were not in court for the decision.
