LOS ANGELES ? Michael Jackson's family were planning funeral arrangements for the tragic pop icon Sunday as reports said police who interviewed the star's doctor for a second time found "no smoking gun."

Jackson's family members were to meet activist Reverend Al Sharpton to discuss plans for a tribute to the star, whose sudden death last week at the age of 50 has triggered a global outpouring of grief.

Sharpton was cited in several media reports as saying Jackson's family was considering a series of simultaneous memorials around the world to reflect the huge appeal of the late "King of Pop."

Sharpton said the family were upset by media coverage of Jackson's death which had focused on the star's problems such as allegations of child abuse, financial woes and battles with prescription drugs.

"They want to see their brother treated right. They told me 'You've gotta keep out there and defend Michael,'" Sharpton told the New York Daily News.

"If we can look past the shortcomings of Frank Sinatra and Elvis Presley, then we can put into proper perspective any shortcomings Michael may have had," Sharpton added.

Jackson's family on Saturday ordered a second autopsy to be carried out after growing increasingly frustrated with "unanswered questions" surrounding the star's death, family advisers said.

Los Angeles police on Saturday conducted a second interview with doctor Conrad Murray, the only person with Jackson when he collapsed.

Veteran US activist Reverend Jesse Jackson -- who is not related to the family -- said the family are suspicious of the role played by Murray.

Murray is reported to have injected Jackson with a powerful painkiller Demerol just before he died and left Jackson's mansion after administering CPR to the stricken star.

A spokeswoman for the cardiologist said he "clarified some inconsistencies" during a second interview with detectives late Saturday.

But the spokeswoman, Miranda Sevcik, added: "Investigators say the doctor is in no way a suspect and remains a witness to this tragedy."

The Los Angeles Times cited a source close to the investigation as saying that "no red flag, no smoking gun" emerged from the interview.

Police said on Friday that Murray is not suspected of wrongdoing.

The Times reported late Saturday that the second autopsy ordered by Jackson's family had been completed. There was no word on the findings.

A preliminary autopsy on Jackson was inconclusive and a final cause of death would not be known until exhaustive toxicology tests are completed in "six to eight weeks" Los Angeles coroner's official said on Friday.

According to The Times, which cited Pennsylvania forensic pathologist Cyril Wecht, the coroner's office probably kept Jackson's brain even after his body had been released to the family in order to conduct a neuropathology test.

This test could reveal whether the singer's brain had been damaged by drug abuse and whether he had suffered overdoses in the past, the paper said.

Large gatherings of Jackson's fans have been held around the world since Thursday, with thousands descending on Hollywood again on Saturday to queue for the right to view Jackson's star on the district's "Walk of Fame."

In New York, large crowds formed outside the legendary Apollo Theater in Harlem, where Jackson launched his career in 1969.

Black Entertainment Television (BET) was quickly reworking its annual awards show on Sunday, turning it into a tribute to the superstar credited with helping bridge racial divides.

Meanwhile revelers at Britain's Glastonbury music festival sported T-shirts with slogans like "Michael Jackson RIP" and "I was at Glasto when Jacko died", while graffiti paying tribute to "The King of Pop" adorned tents.

Jackson's death has sent fans scrambling to stock up on his music, and British chart officials said a compilation album was likely to go to the top of the charts on Sunday.