Rob Reiner, Zubeen Garg, Matthew Perry: Mysterious celebrity deaths that sparked murder investigations

The sudden deaths of popular actors and singers have often left behind more questions than answers. In some cases, a regular postmortem is just never enough, and often calls for a second look into deaths that otherwise seemed 'accidental'. Over the years, several celebrity deaths have taken over the headlines when they trigger full-fledged murder investigations, exposing disturbing details, legal battles and unanswered questions. From Rob Reiner's stabbing, to Zubeen Garg's drowning and Matthew Perry's overdose, here’s a look at some of the most high-profile and mysterious celebrity deaths that sent shockwaves through the entertainment world.