LOS ANGELES , California -LRB- CNN -RRB- -- Fans wishing to attend singer Michael Jackson 's memorial service next week will have to register for the 11,000 free tickets , organizers said Thursday . Michael Jackson is shown rehearsing at the Staples Center on June 23 , two days before his death . Details on how to register for the 10 a.m. -LRB- 1 p.m. ET -RRB- service at the 20,000-seat Staples Center in Los Angeles , California , Tuesday are to be announced Friday . Jackson 's family will hold a private ceremony before the public memorial service , his brother said Thursday . Speaking to CNN 's Larry King , Jermaine Jackson said the ceremony will be held Tuesday morning , but he did not say where . Jackson rehearsed at Staples Center two nights before he died , and he appeared healthy in a video clip of the rehearsal obtained by CNN . Jackson died June 25 after collapsing at his rented home in Los Angeles . AEG , promoter of Jackson 's planned London , England , shows , released the short video of Jackson rehearsing in the arena on June 23 . Jackson sang `` They Do n't Care About Us , '' a song from his `` HIStory '' album , as he danced along with eight male dancers . Watch Jackson rehearse '' Jackson did not specify where he wished to be buried in a 2002 will , which was filed in court Wednesday . Watch CNN 's Anderson Cooper talk about his interview with AEG '' More information emerged Thursday about how Jackson 's estate will be shared , which his will estimated in 2002 as being worth $ 500 million . The family trust created by Jackson to receive all of his assets includes his mother , his children and a list of charities , according to a person with direct knowledge of the contents of the trust . Mother Katherine Jackson 's 40 percent share would go to Michael Jackson 's three children after her death , the source said . The children -- ages 7 , 11 and 12 -- also will share 40 percent of the estate 's assets , and the remaining 20 percent will benefit charities designated by the executors of the will , the source said . A judge has delayed for a week , until July 13 , a hearing to decide whether Katherine Jackson will remain the temporary guardian of Jackson 's children . At a brief talk with reporters Thursday , an attorney for Jackson 's ex-wife Debbie Rowe said she `` has not reached a final decision '' on whether she will challenge Jackson 's mother for custody of Jackson 's two oldest children , according to her lawyer . A Los Angeles TV station quoted Rowe on Thursday morning saying , `` I want my children . '' Except for the statement to the radio station , she has not publicly indicated whether she would seek custody now that Jackson is dead . Rowe was left out of the will . `` I have intentionally omitted to provide for my former wife , Deborah Rowe Jackson , '' the will said . The will nominated Katherine Jackson , now 79 , as the guardian of his children . If Katherine Jackson were to die , `` I nominate Diana Ross as guardian , '' Jackson said in the will , written July 7 , 2002 . Singer Ross , 65 , was a lifelong friend of Jackson 's . Watch how the two had a close relationship '' There 's also a question on when the will 's executors should take over control of the late entertainer 's assets , which Judge Mitchell Beckloff temporarily placed under Katherine Jackson 's control . One man named as executor is John Branca , who represented Jackson from 1980 until 2006 and was hired again before the singer 's death . He helped acquire Jackson 's music catalog , which is worth millions . The other is music industry executive John McClain , a longtime Jackson friend who has worked with him and his sister Janet . DEA reportedly joins investigation The Drug Enforcement Administration has joined the investigation into Jackson 's death , a federal law enforcement official said Wednesday night . And the California State Attorney General 's office said Thursday that it is helping the Los Angeles Police Department in its investigation . The attorney general 's office said it will assist police in sifting through information in a state database that monitors controlled medication . Two law enforcement officials separately confirmed the DEA inquiry , saying agents would look at doctors involved with Jackson , their practices and their possible sources of medicine supply . Neither official wanted to be identified because they could not comment publicly on the matter . Officially , a DEA spokeswoman referred questions to the Los Angeles Police Department , which would not confirm the involvement . `` We routinely offer assistance to any agency regarding the Federal Controlled Substance Act , '' said Sarah Pullen of the DEA . `` However , at this time , we have nothing further to comment about the death of Michael Jackson . '' Speculation about the role of drugs has been swirling since Jackson died June 25 at his rented estate in Holmby Hills . The cause of his death , at age 50 , was pending toxicology results . On Wednesday , police released a car belonging to Jackson 's cardiologist , Dr. Conrad Murray . They had impounded the vehicle Friday , saying it might contain evidence -- possibly prescription medications . Police did not say whether they found anything . Murray 's attorneys issued a statement , asking the public to reserve judgment about the cause of death until the coroner 's tests are complete . `` Based on our agreement with Los Angeles investigators , we are waiting on real information to come from viable sources like the Los Angeles medical examiner 's office about the death of Michael Jackson , '' the statement said . `` We will not be responding to rumors and innuendo . '' No public showing planned for Neverland Logistical and financial challenges derailed earlier plans for a public viewing and private memorial at Neverland Ranch . Planning had been under way for a motorcade to carry Jackson 's body from Los Angeles to the Santa Barbara County ranch , which state and local officials suggested would be difficult and costly . Law enforcement sources had said a public viewing at the ranch was under consideration for Friday , but a spokesman for the family said that it would not happen . `` Plans are under way regarding a public memorial for Michael Jackson , and we will announce those plans shortly , '' said Ken Sunshine , whose public relations firm had been hired by the Jackson family . Despite the announcement , more than two dozen TV satellite trucks lined the narrow two-lane road leading to the ranch . For a time , the California Highway Patrol closed the road to clear up a small bottleneck of cars created by Jackson fans and the media . CNN 's Drew Griffin , Kathleen Johnston , Michael Carey , Paul Vercammen , Carol Cratty and Kara Finnstrom contributed to this report .