MICHAEL Jackson is to be buried without his brain, it has been reported. Following an autopsy at the Los Angeles Coroners Office, the singers brain has been detained for neurological tests - including ones to see what drugs he had taken. Rather than postpone the funeral, the Jackson family has instead decided to bury him without it. The tests, which cannot be done until the brain has sufficiently hardened, are expected to show up any past drug or alcohol abuse, or overdoses the star may have suffered. According to The Sunday Mirror, a source from the coroners office said that removing the brain was 'the only way to carry out the tests. 'The tissue has to be examined. I cant tell you how long that is going to take, he said. The test results could also play a crucial role in criminal investigations into the stars death, the Sunday Express has claimed. Six of his doctors now face being quizzed by the Drug Enforcement Agency, and the State Attorney General Jerry Brown has ordered an investigation into which pills were prescribed and dispensed to Jackson - and by whom. 'If there has been abuses, charges will follow, a spokesman for Mr Brown said. The stars funeral is taking place on Tuesday morning in the Forest Lawn Memorial Park in Glendale, Los Angeles County, after planning permission for burial at Neverland was refused. The family had initially planned a funeral procession from the morgue to Jacksons 2800-acre ranch, where a viewing of the body would be open to the public. Now, however, they are holding a closed-casket family ceremony followed by a public send-off at LAs Staples Centre, during which Stevie Wonder will perform. Fans have been allocated 11,000 tickets for the event, with an additional 6500 to watch it on giant screens at the nearby Nokia Theatre. Daily Mail