Indie guitarist denies inappropriately touching teenager while walking in CBD Weâre sorry, this service is currently unavailable. Please try again later. Dismiss Save Normal text size Advertisement The former guitarist of an indie pop band will fight accusations he sexually assaulted a teenager, claiming he accidentally made contact with the girl while swinging his arms as he walked along a crowded footpath in Melbourneâs CBD. Christian OâBrien, formerly with the band Alpine, is alleged to have intentionally sexually touched the 15-year-old girl on the bottom as he passed her on the footpath on Little Bourke Street on August 2, 2019.