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Marie Osmond

Peter Kramer/Getty Images

Marie Osmond's adopted son took his own life, but it's the grim duty of authorities to officially determine what happened.

The Los Angeles County coroner today announced that an autopsy on Michael Blosil was found to be inconclusive. There was no immediate word on whether the 18-year-old had drugs or alcohol in his system. The official ruling on the cause of the death won't likely be made for up to six weeks, pending toxicology tests.

Autopsies are routine in such cases. It appears that the troubled teen, who had battled depression and spent time in rehab, threw himself off an eight-story downtown L.A. apartment building after leaving behind a suicide note.

Marie has suspended her Las Vegas variety show with brother Donny, and has gone into seclusion.

Her rep, Alan Nierob, tells E! News that "it is undetermined at this time" whether the 50-year-old entertainer will continue with show.

In a statement on Friday, Marie said she and her family "are devastated and in deep shock" over Michael's death and asking for privacy as they grieve.

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If you or someone you know suffers from depression, help is available. The National Suicide Prevention Lifeline is open 24-hours a day at 1-800-273-TALK (8255).