Michael Jackson will be buried without his brain in a private ceremony on Tuesday by his family.

The pop star died after a suspected cardiac arrest on June 25 but the circumstances around his death continue to baffle the investigators. Michael Jackson’s brain was taken out to conduct neuropathology tests to seek clues to his sudden collapse and demise, the Daily Mirror reported.

Los Angeles Coroner’s spokesman Craig Harvey confirmed that neuropathology tests will be carried out on the legend’s brain to see if it holds any clues to the exact cause of his death, said the newspaper. Sources at the coroner’s office revealed that his brain was removed before his body was released to relatives two days after his death, last Tuesday.

The examination on Jackson’s brain cannot begin until at least two weeks after the death when the brain will harden sufficiently to slice it open. Jackson’s family was given the choice to either wait for three weeks to reclaim the organ or to bury the star without his brain but they decided to go ahead with the funeral, which is scheduled to take place on Tuesday morning in the Forest Lawn Memorial Park in Glendale, Los Angeles County.

The closed casket family ceremony will be followed by a public memorial at LA’s Staples Centre.