'That's who Michael would have wanted to have the children. She loves them dearly,' lawyer L. Londell McMillan told CNN in an appearance outside the Black Entertainment Television awards. He said the children were in 'great care' and in a 'loving environment' with their grandmother Katherine at the family's San Fernando Valley estate. Asked about the will, McMillan said the family had heard 'reports of one ... but none has been presented to the family at this time.' As camps began to form for what could be extended battles over Jackson's children, his money and his legacy, the doctor who treated Jackson the day of his death defended himself Sunday. Through his lawyer, Dr. Conrad Murray denied reports that he had injected Jackson with powerful painkillers before his death. 'There was no Demerol. No Oxycontin,' said the attorney, Edward Chernoff. The lawyer, who was present during Murray's three-hour interview with Los Angeles police detectives Saturday, said Jackson was already unconscious when the doctor 'fortuitously' entered the bedroom of the performer's rented Holmby Hills mansion. The 50-year-old entertainer 'wasn't breathing. He checked for a pulse. There was a week pulse in his femoral artery. He started administering CPR,' said Chernoff, a Houston criminal defense attorney. The lawyer's claim was consistent with the account of a source close to the investigation who told the Los Angeles Times that the interview with the doctor turned up 'no smoking gun.' Jackson family members, however, continued to express doubts Sunday. Asked about doctors and others around Jackson before his death, his father, Joe, told CNN: 'I have a lot of concerns, but I can't get into that.' Appearing on the BET Awards red carpet outside the Shrine Auditorium with a publicist and McMillan, Joe Jackson told CNN that he and his wife alone were in charge of their son's estate and legacy. The 80-year-old patriarch declared in a statement read by the publicist that the couple 'have the personal and legal authority to act, and solely Katherine and I have authority for our son and his children.' Whether the elder Jackson has that authority is not clear. Michael Jackson might have written a will naming another person as executor of his estate, and Debbie Rowe, the mother of Jackson's two oldest children, might have a strong claim for custody, legal experts have said. The announcement that Katherine Jackson would seek custody of the children -- Prince Michael Jr., 12, Paris Michael Katherine, 11, and Prince Michael II, 7 -- has potential to become its own complex legal case. Given Jackson's unusual custody arrangements negotiated with Rowe over his two oldest children, it would seem likely his wishes for their care after his death were written and notarized at the time of the agreement, family law experts said. However, experts said that if someone other than the children's biological mother is designated for custody, Rowe would have a good chance of challenging the arrangements as her waiving of parental rights probably would be deemed illegal. Rowe sued Jackson over the custody agreement and won an appeals court verdict in 2006 but settled out of court on undisclosed terms. Prince Michael II was born of a surrogate whose identity hasn't been made public. The surrogate's custody petition, if she were to make one, wouldn't have the same power as Rowe's unless she was proved to have been the genetic mother as well. Despite speculation that Jackson was not the biological father of the older children, under California law he was the legal parent as he was married to Rowe at the time they were born. The court presiding over Jackson's affairs might appoint a guardian to protect the interests of the children. If no will or trust surfaces, spelling out how he wanted his estate dispersed, under state law his three children would inherit his property in equal shares. McMillan suggested Sunday that if there was not will, Katherine Jackson 'is the duly appointed person' to oversee 'for the best interest of the children.' If, however, Jackson left guidance and designated an executor, that person has 30 days from knowledge of his death to petition the court for administration of his estate or the right to serve as executor could be seen as waived. Joe Jackson said the family was still discussing funeral arrangements. 'We haven't gotten to that yet. But we're working on that,' he said. At the celebratory ceremony, which turned into as much of a tribute to Jackson as an awards presentation, sister Janet Jackson briefly addressed the cheering audience. 'To you Michael is an icon, but to us Michael is family, and he will forever live in all of our hearts.' Staff writers Cara Mia DiMassa, Carol J. Williams and Alan Zarembo contributed to this report. 