CCTV images capture the moments before Dmitry Vinogradov embarks on a deadly shooting spree.<br/> <br />The 30 year old lawyer is seen arriving for work at his pharmaceutical firm in Moscow, before arming himself with two semi automatic rifles.<br/> <br />As he disappears out of screen, he shoots four men and women and their desks.<br/> <br />A cleaner is seen fleeing.<br/> <br />Vinogradov gave himself up to security guards after the shootings - believed to be a drunken rampage after his girlfriend left him.<br/> <br />Investigators say Vinogradov left a gruesome letter on his social media page before the killings, expressing a bitter hatred of those around him.
