Shooting dead a civilian to protect his mates is the day Brett Pennell can never forget, and he relives a lifetime of high-risk work as a tactical officer and sniper, telling Gary Jubelin about his lingering feelings of betrayal, anger and guilt. New episodes of season 2 will be released exclusively on icatchkillers.com.au a week earlier than anywhere else. Subscribers to icatchkillers.com.au get exclusive access, as well as access to articles, videos of Gary's interviews and interactive content.   See omnystudio.com/listener for privacy information.