Ms McKenzie 's , 42 , stabbed his estranged wife to death in July 2013 . Keisha McKenzie , 28 , suffered 42 separate knife injuries before she died . Brutal attack was carried out in front of their screaming seven-year-old son . Also stabbed his ex and Desmond Brooks sister seriously injuring both . Court heard carried out the attack because he was 'fed up of their nagging ' He had been facing deportation after serving time on drugs charge . Brooks is now facing at least 29 years in prison after admitting murder .
Desmond Brooks , 42 , stabbed his estranged wife to death in July 2013 . Keisha McKenzie , 28 , suffered 42 separate knife injuries before she died . Brutal attack was carried out in front of their screaming seven-year-old son . Also stabbed his ex and Ms McKenzie 's sister seriously injuring both . Court heard carried out the attack because he was 'fed up of their nagging ' He had been facing deportation after serving time on drugs charge . Brooks is now facing at least 29 years in prison after admitting murder .