LOS ANGELES (dpadpa) — A massive public memorial for Michael Jackson is to take place Tuesday at the Staples Centre in downtown Los Angeles, his concert promoter Randy Phillips said Thursday.

Broadcasters showed footage Thursday of a dancing, singing Jackson at the same venue on his last rehearsal just before he died. The video seemed to corroborate previous comments from numerous people who had been present that Jackson appeared healthy and engaged before his death, and was fit to go ahead with his planned 50-concert comeback engagement in London.

Meanwhile, his former wife, Debbie Rowe, reportedly said she would battle Jackson’s family for custody of her two children. In another new development, the Los Angeles Police Department called in  the federal Drug Enforcement Administration to help in the investigation of Jackson’s death, an indication that an abuse of prescription drugs may have played a role.

Phillips, president and chief of concert firm AEG, said the service will begin at 10 am (1700 GMT) at the 20,000-capacity Staples Centre with live images screened on widescreen televisions for an overflow crowd expected to gather in the plaza outside the huge basketball stadium and convention centre.

“Details are still to be finalized when I meet with the Jackson family this afternoon,’’ Philips said on local TV station KNBC. “Everything is in preliminary stages except the place and time.’’

The station reported that Rowe, who is the mother of Jackson’s two older children, would seek custody. “I want my children,’’ she was reported to have said. “I am stepping up. I have to.’’ But CNN quoted a lawyer for Rowe as saying that she had made no decision on custody. A court hearing on the issue will take place on July

13, reports said.