Michael Anthony Guider (20 October, 1950) is an Australian child molestor who was imprisoned on sixty charges of child sexual abuse in 1996. He received an additional sentence in 2002 for the manslaughter of Sydney girl 9 year-old Samantha Knight.
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 brother, Tim, was born in 1953. The two boys spent time in institutions because their mother was unstable and unable to look after them. Guider later told prison psychologists that he sexually abused his mother, his brother Tim and few of the younger boys at the boys' home.
In the 1970s Guider was charged with various offence's 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.
While in prison, Guider continued to pursue his interest in Aboriginal culture and history, writing a number of short books on the subject. These books were sent to various councils in Sydney and then held in various local libraries, as well as the State Library of New South Wales. He produced something like sixteen books varying in length from six pages to twenty-eight. He also commenced studies of archeology at the university level.
Guider was arrested in May 1995 for child sex offences. In September 1996 he was sentenced to 16 years' imprisonment with a non-parole period of 10 years on 60 charges against 11 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.