In the early hours of 7 October 2012, Hammill was involved in an altercation outside a Liverpool nightclub while celebrating a friend's birthday and was arrested for assaulting two female paramedics. The paramedics had attended the scene after Hammill had collapsed inside the club drunk and been taken outside. He was formally charged with two counts of assault on 27 October, to which he pleaded guilty on 12 November. On 20 November 2012 he was sentenced to 12 weeks of jail suspended for 12 months, 150 hours of unpaid work and to pay £350 to each of the paramedics. Hammill later told The Huddersfield Examiner that he regretted his action.