Michael Jackson's father has refiled a wrongful death lawsuit against the doctor charged over his son's death.
And he has added as a defendant a Las Vegas pharmacy that records show sold the physician a powerful anaesthetic blamed for the star's death.
The lawsuit seeks unspecified damages against Dr Conrad Murray, who has pleaded not guilty to involuntary manslaughter in the separate criminal case over the singer's June 2009 death.
Joe Jackson initially filed his case against Murray in federal court on the first anniversary of his son's death. A judge, however, refused to hear the case and said it should be handled in state court, where it was refiled.
"This has been a long process and the facts of Michael's death have been way too slow in emerging," said Joe Jackson's attorney, Brian Oxman. "There is still much to discover and we're going to find it out."
The lawsuit also names Applied Pharmacy Services, which court records show sold Murray the anaesthetic propofol during the month before the singer's death. The pharmacy is accused of selling Murray excessive quantities of the drug, which is normally administered in hospital settings.
Authorities have said the sale was legal.
"We'd like to remind people that Dr Murray has not been found guilty of anything, and we believe his innocence will be proven in a court of law," Charles Peckham, an attorney for Murray, said in June when the case was initially filed.
The Los Angeles County coroner has blamed Jackson's death on propofol intoxication and ruled it a homicide.
Joe Jackson's lawsuit claims Murray was negligent in administering propofol to Michael, and he did not tell paramedics or an emergency room doctor that he had given the singer the drug.