Embattled comedian Andy Dick is requesting Louisiana prosecutors reopen an investigation into his alleged assault outside a New Orleans nightclub last year after changing his mind about co-operating.The Employee of the Month star claims he was knocked unconscious in an unprovoked attack by David Hale last August after finishing a stand-up set at a club in the French Quarter.At the time, Hale insisted it was Dick who instigated the altercation after reportedly grabbing the 47-year-old’s genitals,