The mother of a British graduate killed by a gunshot wound at her father's home in the US has hit out at the 'baffling' decision by police which means her 'killer' will never face justice.

A manslaughter investigation was launched in February after Lucy Harrison, 23, from Warrington, Cheshire, was killed at her father's house in Prosper, Texas, on January 10.

Coroners found she died of a gunshot wound to the chest and she 'was shot by another person' from a 'medium range'. US police investigated her death as a case of 'negligent manslaughter'.

Yesterday it was announced that no charges were being issued over the death of Ms Harrison, a decision she has described as 'beyond comprehension'.

Mother Jane, from Warrington, Cheshire, told the Sun: 'Although we have tried so hard to prepare for this moment, it is a brutal outcome to accept.