“I’ll get you.”  Prison officer Maria Costigan's niece Tanya Costigan was murdered in a savage domestic violence episode that saw her attacked while holding her newborn baby. Then, by chance, Maria ended up stationed at the same jail as her niece's killer. Then he started taunting her, whispering threats as he’d walk past. Every episode of On Guard, plus articles, amazing images and the multimedia experience is available right now, go to onguardseries.com.au. See omnystudio.com/listener for privacy information.