Murderous uncle who killed his student niece and dumped her naked body in a blowhole admits vile sex attack after images were found on a mystery USB drive
- Derek Barrett was jailed in 2017 for killing his young niece Mengmei Leng
- Barrett has now admitted to filming her while she was bound and naked
- He was charged after the carer of a woman with dementia found the USB
A man jailed for murdering his niece whose naked body was found floating in a NSW blowhole has now admitted a string of sex offences against her after images of the attacks were found on a USB.
The carer of a woman with dementia found the USB in her hand in November 2019, but Justice Helen Wilson on Wednesday was told Derek Barrett had given no explanation of how she obtained it.
The now 32-year-old was jailed for at least 34 years and six months in 2017 after admitting repeatedly stabbing student Mengmei Leng, whose body was found in the blowhole at Snapper Point on the Central Coast in April 2016.
Derek Barrett was sentenced to 46 years in jail with a non-parole period of 34 years and six months for the ‘brutal’ murder of his niece Mengmei Leng (both pictured)
He has admitted filming the 25-year-old niece of his wife, while she was bound and naked, for his sexual gratification.
‘This was a despicable crime of extreme brutality and great wickedness,’ Justice Wilson said when jailing him for a maximum of 46 years.
Barrett formally pleaded guilty in the NSW Supreme Court on Wednesday to nine charges including assault with acts of indecency and aggravated sex assault, all committed on April 22 2016 and asked the judge to take into account a further eight offences.
The sentence hearing was told the Crown failed in its attempt to have the fresh evidence obtained from the USB presented to Barrett’s unsuccessful sentence appeal hearing in 2019.
Mengmei Leng’s (pictured) naked body was found floating in the blowhole at Snapper Point on the NSW Central Coast in April 2016
The Crown had submitted it was relevant to the appeal as it was capable of showing Barrett ‘repeatedly violently sexually assaulted his victim whilst she was restrained and, in so doing, derived pleasure from the pain, distress and suffering of the victim’.
Forensic psychiatrist Dr Richard Furst, who gave evidence at the murder sentence hearing, on Wednesday testified that his updated opinion was Barrett had a schizoid personality disorder or an autism spectrum disorder,
He also referred to his having a voyeuristic disorder and a sexual sadism disorder.
The hearing is continuing.