MUMBAI, Feb. 14 -- Mauris Noronha, also known as Mauris bhai, the alleged killer of Shiv Sena (UBT) leader Abhishek Ghosalkar last week, had picked up shooting skills by watching YouTube videos. It is also believed Noronha found himself in the deep end after Ghosalkar had alerted the US Embassy about the alleged rape case, following which Noronha's visa was cancelled....