A man who created a fake Facebook account to lure a teenage girl into Sydney bushland before killing her has been sentenced to 28 years in prison for the "most heinous" crime.
Christopher James Dannevig, 22, pleaded guilty last year to murdering 18-year-old Nona Belomesoff in bushland in Campbelltown in May 2010.
In handing down the sentence at the Supreme Court today, Justice Peter Hall said Dannevig had brought about the death of a "completely vulnerable" girl.
He said the murder "involved brutality of a high order, that makes this crime a most heinous one".
He sentenced Dannevig to a maximum of 28 years in jail, with a non-parole period of 21 years.
Taking into account time spent in custody, Dannevig will be eligible for release on August 7, 2032.
After the sentence was handed down, a female supporter of Ms Belomesoff's family yelled "Thank you, judge ... God bless you".
During sentencing submissions earlier this month, Crown Prosecutor Christopher Maxwell QC said Dannevig had shown a degree of planning by creating a Facebook account in April 2010.
He used the account to pose as Jason Green - a team leader for Wildlife Information Rescue and Education Service.
Tapping into Ms Belomesoff's "passion" for animals, Dannevig offered her a job and organised several meetings.
Mr Maxwell said this enabled him to create a situation where Ms Belomesoff was "alone and vulnerable in bushland".
The court also heard Dannevig showed a degree of "cunning" in learning Ms Belomesoff's ATM card PIN number, which he used to withdraw $170 shortly after her death.
After being arrested, Dannevig told an undercover officer he had drowned the teenager by holding her down in a river for two minutes.
