The police originally said the girl had drowned after taking drugs but changed their story after her mother complained.
Anthony Robert Harvey becomes the first person in WA ordered to never be released from prison for killing his three children, his wife and his mother-in-law.
The 17-year-old student suffered a breakdown following a sadomasochistic relationship with the Queensland teacher.
Victorian woman Krystal Fraser was just days away from giving birth when she went missing nearly 10 years ago.
She claimed more than $200,000 in fraudulent benefits and dressed up a doll as her deceased baby, a Sydney court heard.