|Born||24 April 1979|
|Other names||Mark van Krevel|
|Criminal penalty||2 x life imprisonment without parole|
|Criminal status||Incarcerated at Goulburn Correctional Centre|
|Conviction(s)||Murder x 2|
David O'Hearn was murdered in his Albion Park home on 12 June 1998. His head was smashed in with a wine decanter. He was then decapitated, with his head later found in the kitchen sink. His hand was cut off, and he had been partially disemboweled. Valera had used O'Hearn's hand to draw several satanic pictures on the living room walls.
Frank Arkell, a former Wollongong Mayor and former member of the New South Wales State Parliament, was murdered in his Wollongong home on 26 June 1998. His head had been smashed in with a bedside lamp, with the electric cord wrapped tightly around his neck. Tie pins were stuck in Arkell's eyes and cheeks. Arkell had been mentioned in the Wood Royal Commission's report; he had been embroiled in child pornography and paedophilia scandals in the years leading up to his death, and he had been acquitted of child sex offences six months before his murder, but investigations were continuing, with further charges to be laid.
Confession and conviction
Three months after the two murders, Mark Valera turned up at Wollongong Police Station to confess to the crimes. Valera (previously known as Mark van Krevel) was a 19-year-old local who had never come under police notice before. He lived in different places around the area, including a house with a friend which was just a few doors down the street from David O'Hearn.
At his trial in 2000, Valera claimed that his father, Jack van Krevel, had sexually and physically assaulted him during his childhood, and that this led him to commit the two murders. He claimed that David O'Hearn had sexually propositioned him and this caused flashbacks of his troubled childhood. He also claimed that Frank Arkell, an alleged paedophile, had done the same, and that he was trying to save a child from suffering.
In December 2000, Valera was found guilty of the murders, and was later sentenced to two consecutive terms of life imprisonment without the possibility of parole. He later appealed against the sentence, but the appeal was rejected.
He is serving his sentence at Goulburn Correctional Centre.
Further family issues
Less than two weeks after Valera became the third-youngest person in NSW to be sentenced to life without parole, his father Jack van Krevel was found stabbed to death in his Albion Park home. It was later found that Valera's sister and van Krevel's daughter, Belinda van Krevel, had 'asked' Keith Schreiber (a friend of Valera's who was also a suspect in the David O'Hearn murder) to kill her father because he was molesting her two-year-old daughter, and blamed him for Mark's imprisonment. Schreiber was found guilty of the murder and was sentenced to life imprisonment with a non-parole period of 12 years. He became eligible for parole in 2012.
Belinda van Krevel pleaded guilty and was sentenced to six years' imprisonment, with a non-parole period of three and a half years. She was released from prison on 1 June 2007, saying "I just want to get on with my life". She was subsequently arrested in 2010 and charged with assault and theft. On 5 July 2013 she was arrested again and charged with the stabbing of her boyfriend.
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- Bearup, Greg (31 May 2007). "Death surrounds her". The Sydney Morning Herald. Retrieved 9 September 2012.
- "Belinda Van Krevel set for freedom". Nine News. AAP. 19 May 2007. Retrieved 4 January 2012.
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- Levy, Megan (5 July 2013). "Belinda Van Krevel charged with boyfriend's stabbing". The Sydney Morning Herald. Retrieved 5 July 2013.