Michael Anthony Guider (born 20 October 1950) is an Australian paedophile, serial child molester and manslaughterer who was imprisoned on 60 charges of child sexual abuse in 1996. He received an additional sentence in 2002 for the manslaughter of 9 year-old Sydney girl Samantha Knight, who disappeared from Bondi, New South Wales in 1986. He was released from prison on 5 September, 2019, under strict conditions and an extended supervision order. Early life Michael Guider was born in the city of Melbourne, Victoria, Australia. He and his mother moved to Sydney in 1952. His mother had an unstable relationship with an army cook who was an alcoholic. A younger brother, Tim, was born in 1953. The two boys spent time at Melrose Boys Home because their mother was unstable and unable to look after them. Guider later told prison psychologists that he was sexually abused by his mother, and later at the boys' home. In the 1970s, Guider was charged with various offences after setting fire to a shop owned by a woman he had had a relationship with. Guider had worked as a gardener at the Royal North Shore Hospital, and over the years had developed a keen interest in Aboriginal culture and sites around Sydney. He had earned some respect as an amateur expert on the subject and his material had been used and acknowledged in at least one published book. Imprisonment Guider was arrested in December 1995, after he had fondled two 7-year-old girls. One of the girls told her mother, who went to the police. In 1996, he was sentenced to 16 years' imprisonment with a non-parole period of 10 years on no less than sixty charges against eleven children. His usual modus operandi had been to babysit the children of women he knew and sedate them with the sleeping drug Temazepam. He would then molest and photograph them while they were asleep. He received a fixed term of six years and six months' imprisonment in 1999 for 11 further charges against two other children, with the judge ordering that six months of the sentence be served cumulatively. Guider was placed in conditions of strict protection in Goulburn prison. In spite of this, he was bashed savagely on two occasions. He was admitted to the prison hospital with fractures to his right leg and hand, plus numerous abrasions. One of his ears was almost torn off.