*Joseph Jackson intends to file a wrongful death lawsuit against his late son’s doctor Conrad Murray within 90 days, claiming the physician’s actions resulted in murder.

Jackson’s lawyer Brian Oxman said Tuesday the amount of the powerful anesthetic propofol given to Michael Jackson by Murray before his death on June 25 “was reckless, and it amounts to second-degree murder.”

“The continuous administration of drugs over six weeks — he (Murray) gave him propofol every night — that is Russian roulette, that is loading six bullets into a gun with only six chambers,” Oxman told Reuters.

Murray has already been charged with involuntary manslaughter in the death of Jackson, 50, who had been rehearsing for a series of concerts in London before his death. Murray was hired by concert promoter AEG Live to care for Jackson in the months leading to the London shows.

Jackson’s death has been ruled a homicide caused by “acute propofol intoxication” at a level that was equivalent to that used for anesthesia during “major surgery.”

The King of Pop had been taking propofol for insomnia, and Murray has admitted administering the drug to him the day he died. Murray has said he did nothing wrong and has pleaded not guilty to involuntary manslaughter.

Oxman says his private investigators have been gathering evidence and testimony that concludes Murray bears responsibility. He said California law requires anyone filing a wrongful death lawsuit to do so within one year of a person’s death and to give the defendant 90 days’ notice before the filing.

Oxman said Joe Jackson decided to notify Murray’s lawyer, Houston-based Ed Chernoff, now to meet the one-year requirement because the anniversary of his son’s death is 90 days away and because it has taken this long to gather evidence.

Oxman said it was not yet clear if other Jackson family members will join in the lawsuit.