Cult leader William Kamm and partner accused of grooming a girl for 45 children
Consensus Summary
William Kamm, a 76-year-old self-proclaimed cult leader known as 'Little Pebble,' and his 60-year-old partner Sandra Susan Mathison are facing trial in Sydney for allegedly grooming a girl over a decade, beginning when she was six years old. Kamm, leader of the Order of Saint Charbel, allegedly convinced the girl she had a divine mission to become his wife and bear 45 of his children as part of a post-apocalyptic repopulation plan. The cult operates from 21 properties in Bangalee, near Nowra, NSW, and Kamm allegedly orchestrated the grooming from prison between 2011 and 2014, later breaching supervision orders to continue contact. Both defendants pleaded not guilty to charges including child grooming, incitement, and breaching court orders. The trial, which began June 23, 2026, includes testimony from the complainant, who described feeling coerced into the role from a young age and ultimately reported the abuse in 2023. Defense lawyers argue Mathison’s case is secondary to Kamm’s and that he never physically met the victim, while prosecutors rely on recorded calls, letters, and gifts as evidence.
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Key details reported by multiple sources:
- William Kamm (76), known as 'Little Pebble', and Sandra Susan Mathison (60) are on trial for grooming a girl aged 6–16 between 2010–2020
- Kamm allegedly told the girl she was his 'main queen' and had a 'mission from God' to bear 45 of his children
- Kamm led the 'Order of Saint Charbel' cult with 21 properties and 10 caravans on Koloona Drive, Bangalee, near Nowra, NSW
- Kamm allegedly planned to repopulate a 'new world' with 12 'queens' and 24 'princesses' bearing his children
- The trial began on June 23, 2026, at Sydney’s Downing Centre District Court before Judge Nicole Noman
- Kamm was in jail from 2011–2014 for unrelated matters and allegedly groomed the girl via recorded prison calls
- Kamm allegedly breached supervision orders by contacting the girl after his 2014 release
- The complainant moved to the Bangalee property in 2019 and left after expressing discomfort with Kamm
- Kamm and Mathison were arrested in September 2024
- The complainant testified she understood her role as Kamm’s wife from age 6 and was told to keep it secret
Points of Difference
Details reported by only one source:
- Crown prosecutor Andrew Norrie mentioned the complainant vomited from anxiety about intercourse with Kamm
- Kamm allegedly said in 2014: 'It would be nice to go on a cruise together to carry out God’s mission'
- The complainant reported the matter to police in 2023 after saying she was no longer 'going to do God’s will'
- Kamm allegedly sent letters and gifts to the complainant as part of the grooming
- The complainant briefly gave evidence on Tuesday afternoon detailing the cult’s 'mission'
- Kamm pleaded not guilty to inciting a person to do a sexual act with him in aggravated circumstances
- Kamm saw himself as a 'pope, visionary, and prophet' who received messages from Jesus Christ and the Virgin Mary
- Mathison allegedly told the girl she could receive Kamm’s sperm in a cup for impregnation in 2020
- Plans for the girl to meet Kamm in person were delayed by COVID-19 lockdowns in 2020
- Mathison’s barrister, Dev Bhutani, called the Crown case against her 'derivative' of Kamm’s charges
- Kamm’s barrister, David Mulligan, submitted his client had never physically met the complainant
- The girl was allegedly 'spiritually married' to Kamm at age 7
Contradictions
Conflicting information between sources:
- The ABC states Kamm allegedly told the girl to 'put her running shoes on so he could chase her around' in 2013, while the Guardian specifies this was in October 2013 but does not mention the running shoes detail
- The ABC notes the complainant left the Bangalee property after expressing discomfort during a phone call in 2019, while the Guardian does not specify the exact reason for her departure beyond general discomfort
Source Articles
Court told alleged cult leader groomed girl to have 45 of his children
William "Little Pebble" Kamm has denied allegations he groomed a girl for more than a decade after he was accused of declaring in phone calls that it was her "mission" to become his queen.
Cult leader William Kamm and wife groomed young girl for a decade, Sydney court told
The 76-year-old allegedly ordered he should have 12 wives to ‘repopulate’ the world. He and his wife deny the charges Get our breaking news email , free app or daily news podcast The leader of a cult and his wife allegedly groomed a young girl over a decade so she could bear 45 of his children in a post-apocalyptic world. William Kamm, also known as “Little Pebble”, was the leader of the Order of Saint Charbel, a religious cult run from a property on the New South Wales south coast. Continue rea