January 2017 Mansfield man jailed after sexually assaulting a 13-year-old girl A 25-year-old Mansfield man of has been jailed after pleading guilty to sexually assaulting a 13-year-old girl. Shawn Horsfield appeared at Nottingham Crown Court on Friday 20 November. The offence had taken place at a house in Mansfield sometime between 31 January and 2 February this year. Horsfield, of Littleover Avenue, who had admitted two counts of sexual assault at a previous hearing, was told he would serve a prison sentence of 32 months.