Based on the context and the answer, generate a question. 

Context: Rap impresario Dr andre young jr dr dre . Dre 's 20-year - old son was found dead over the weekend in his Woodland Hills home , coroner 's officials said . TOXICOLOGY TEST ORDERED FOR DR . DRE 'S SON : Autopsy alone could not determine cause of death andre young jr .

Answer:

For a cause of death .



Why are they testing the young man 's blood ?