A prominent Sydney barrister and co-founder of a charity dedicated to supporting disadvantaged Cambodian youth has been found deceased. Mark Philip Dennis, 60, was discovered at his Leichhardt unit in Sydney’s inner west on Monday evening, according to a statement released by NSW Police on Tuesday. A report is currently being prepared for the coroner.
Dennis had been facing serious charges related to child abuse material offences. He was arrested in January by Australian Federal Police officers upon his arrival at Sydney Airport, having disembarked a flight from Cambodia. The Australian Border Force initiated the stop, leading to the subsequent arrest.
The allegations against Dennis stemmed from a search of his phone by police, who reportedly discovered an image of a boy along with explicit, sexualised chat logs involving and concerning minors. He was subsequently charged with multiple offences, including possessing or controlling child abuse material obtained using a carriage service, transmitting such material, and a related import offence.
Prior to his death, Dennis had been released on bail in January. He had not yet entered any pleas to the charges and was scheduled to appear in court again on March 18. It is anticipated that the criminal proceedings will be withdrawn on that date due to his passing.
Dennis was a well-respected figure within the legal community. Admitted as a lawyer in 1991, he had also served as the principal solicitor of the Western NSW Aboriginal Legal Service. His expertise in criminal law was evident in his extensive publications, including a 2017 article titled “Defending Child Sexual Assault in the Local Court.”
Beyond his legal career, Dennis was also known for his philanthropic work. He was the co-founder and chair of the charity Reasonable Cause, an organisation focused on providing educational advancement opportunities for underprivileged youths in Cambodia.
Following the allegations and Dennis’s arrest, the Phnom Penh-based non-profit Cambodian Children’s Fund, which had a funding partnership with Reasonable Cause, announced it had ceased their collaboration. The Cambodian Children’s Fund confirmed that Dennis had visited a school in the Cambodian capital in January 2022 for an hour to support a digital education project. This initiative was reportedly extended for three years in 2024 before its termination in light of the legal proceedings against Dennis.
The circumstances surrounding Dennis’s death are now subject to a coronial investigation.
For individuals seeking support or information regarding child abuse, the following helplines are available:
* Lifeline: 13 11 14
* Kids Helpline: 1800 55 1800 (available for individuals aged 5 to 25)
