A 24-year-old man has been fined $750 for driving without due care and causing an accident that killed a motorcyclist in South Australia. Benjamin Paul Staveley of North Haven, in Port Adelaide, also had his licence disqualified for eight months. Staveley's lawyer pleaded guilty on behalf of his client in the Port Adelaide Magistrate's Court today. The magistrate said Staveley had a momentary lapse of concentration when he turned into the path of a motorcyclist at an intersection in Ethelton in 2004. The victim's mother, Julie McIntyre, says she is disappointed with the result. "I feel as though my son has been treated as road kill by our justice system," she said. "There is something strange about a justice system when you consider that fines that are issued by our courts are presumably worth less than the lawyers' fees involved in defending the charges."