Christopher james dannevig wikihow

Facebook killer Christopher James Dannevig cops 21 years in jail for the murder of Nona Belomesoff

In handing Christopher James Dannevig a 28 year maximum sentence, Justice Peter Hall said the crime was committed against a "completely vulnerable and defenceless young woman."

Dannevig murdered Nona Belomesoff in Western Sydney bushland on May 12, 2010 after she went with him on an overnight bush trip because she believed he worked with animal welfare agency WIRES.

The Supreme Court heard the pair first met over Oasis Active, then became Facebook friends after Dannevig created a profile in the name Jason Green.

Justice Hall said Nona, an animal lover had been lured to a "bogus training camp".

He said the murder "involved brutality of a high order that makes this crime a most heinous one."

The court heard Dannevig suffers from an intellectual disability, but Justice Hall noted "the sophisticated course of action" he took in striking up the Facebook interaction.

The 22-year-old said nothing as he was told he wouldn't be eligible for parole until August 2032.

Nona's family called out "thank you, God bless you judge" as the sentence was handed down.

Originally published as Facebook killer cops 21 years in jail