Katie Perinovic coldly murdered her three young children before killing herself
She joins a group of mums who have shocked the world with their crimes
Many mothers who kill their own children plead guilty to charges of infanticide
The controversial law can see mothers that kill their own walk free
Akon Guode was jailed for 18 years for killing her four-year-old twins and toddler
Infanticide carries a maximum penalty of just five years in jail in Victoria