Bobbi Kristina's cause of murder kept under wraps

Bobbi Kristina's case has now become a mystery which is tangling day-by-day, as of recent, medical examiners are not revealing the actual cause of death they have diagnosed because cops are still looking for the evidence that could lead to a homicide prosecution.

The Fulton County Medical Examiner revealed that they exactly know what killed Whitney Houston and Bobby Brown's only daughter, but they couldn't reveal it as legal authorities have ordered to be keep the findings sealed, TMZ.com reported.

Reportedly, the judge's order underscores that the criminal investigation is active, that's why they don't want the findings to interfere with their investigation or to give persons of interests and suspects a road map preventing them from making incriminating statements.