'Deranged monster' jailed for killing partner over 'untrue' belief she was in incestuous relationship

The victim's sister has called for stricter laws on coercive control and domestic abuse 

Euphrasia McDermott holds a photo of her deceased sister Amadea McDermott outside court on Tuesday afternoon. Amadea was described as a "kind, caring, funny, loving, beautiful and amazing mother, daughter, sister, auntie and friend". Picture: Collins Courts

The sister of a woman who was killed by a "deranged monster" who had beaten, threatened and controlled his victim during their relationship has called for stricter laws on coercive control and domestic abuse.

Martin Hayes was sentenced on Tuesday to 12 years and six months in prison by Mr Justice Paul McDermott for the manslaughter of his partner, Amadea McDermott. Mr Justice McDermott said the killing was clearly a case of domestic violence and he noted that during her life, Hayes had tracked Ms McDermott's movements using a secret app on her phone.