The battle between Michael Jackson's estate and his former doctor is rumbling on - Conrad Murray has been threatened with legal action after he gave an interview about the late King of Pop to a U.K. newspaper. The physician was freed from prison in October (13) after serving half of a four year sentence for the involuntary manslaughter of the Thriller hitmaker, who died in 2009 after being injected with a fatal dose of anaesthetic Propofol. In an interview with Britain's Mail on Sunday last week (ends24Nov13), Murray claimed that Jackson had given himself a second shot of Propofol as well as revealing he was a "decrepit" and "frail" man who would beg for drugs to help him sleep. Murray also made the bizarre claim that he "held (Jackson's) penis every night to fit a catheter because he was incontinent at night". Howard Weitzman, the lawyer for Jackson's estate, has now fired off a cease and desist letter, ordering him to stop talking or face a lawsuit, according to TMZ.com. The letter warns, "Your recent comments to the media about Mr. Jackson's medical treatment and ultimate death shamefully violate the physician-patient privilege under California law."