Las Vegas gunman Stephen Paddock has been described as a brilliant man who had an intimate knowledge of the second amendment and a room dedicated to his guns, according to a friend. The Australian man, who wanted to remain anonymous, had multiple encounters with Paddock between 2013 and 2015 after he started dating his girlfriend's sister. snip As investigators reconstruct the life and recent activities of Paddock in a bid to work out a motive, details keep emerging that suggest the gunman's mental health had deteriorated on the months prior to the massacre. Paddock had reportedly experienced significant weight loss...