A Sydney judge acquitted cult leader William Kamm and his wife Sandra Susan Mathison of child grooming charges after prosecutors couldn't prove beyond reasonable doubt that the couple intended unlawful sexual activity before the alleged victim turned 16. Judge Nicole Noman delivered the not guilty verdict at Sydney Downing Centre following a judge-alone trial that concluded last month.
Kamm, 76, who calls himself Little Pebble, and Mathison, 60, faced multiple charges including grooming a child for unlawful sexual activity and grooming a child under 14. Kamm also faced two counts of breaching an extended supervision order and inciting a person to perform a sexual act in aggravated circumstances. The court cleared him of all charges.
The Evidence Standard
Judge Noman accepted that Kamm and Mathison had a plan for the complainant to become Kamm's spouse. But that's where the prosecution's case hit a wall. The evidence wasn't strong enough to prove beyond reasonable doubt whether this would occur before she reached 16, the judge ruled. That distinction proved decisive in a case built on alleged intentions rather than completed acts.
The complainant, now in her 20s, testified that grooming and manipulation began when she was seven. She alleged Kamm whispered coded messages through recorded phone calls from Long Bay prison, telling her she'd be his "main queen" and begin a "new era" for their cult. Mathison, who joined Kamm's cult in 1984, allegedly facilitated these calls by taking the girl into a room and putting the phone on loudspeaker.
Credibility and Proof
Judge Noman found the complainant's evidence truthful, though she was "mistaken" about some details. The complainant had the unenviable position of recounting more than a decade's worth of events, the judge noted. As she got older, the complainant testified she experienced panic attacks and suicidal thoughts as the alleged grooming escalated to forcing her to perform sexual acts during phone calls.
The judge acknowledged Kamm held a position of power over the complainant. However, the evidence didn't prove he knew she wasn't consenting to masturbating over the phone with him. That gap between what prosecutors alleged and what they could prove became insurmountable.
Kamm and the girl never met because COVID-19 lockdown restrictions prevented him from leaving Sydney during the fifth year of pandemic-related controls.
Legal Constraints Remain
Outside court, the cult leader said, "God bless the judge." Kamm had been on bail throughout the trial. The convicted paedophile maintains a compound known as the Order of St Charbel in Bangalee on the NSW South Coast. Court orders from prior offending against a young girl have restricted him from returning there for years, constraints that remain in force despite this acquittal.
Why This Matters:
This verdict underscores the high evidentiary bar required in criminal prosecutions, particularly in cases involving alleged grooming where intent must be proven beyond reasonable doubt. The judge's careful distinction between accepting that a plan existed and proving when it would be executed highlights the burden prosecutors face when dealing with preparatory conduct rather than completed offenses. While Kamm's acquittal on these charges doesn't erase his status as a convicted paedophile or lift existing court restrictions, it demonstrates how the criminal justice system requires concrete proof of criminal intent tied to specific timeframes. The case also reveals the challenges prosecutors encounter when relying on testimony about events spanning more than a decade, where credibility issues and evidentiary gaps can undermine even truthful accounts. For communities concerned about child protection, this outcome reinforces that existing supervision orders and restrictions remain the primary legal mechanisms constraining Kamm's activities.