Heath Ledger's death at 28 was officially ruled an accidental overdose, but theories linger about whether it was actually accidental or part of a larger sinister plot.
Anna Nicole Smith's life and death have been the subject of much speculation and conspiracy, involving murder, drugs, suicide, and even mind control experiments.
Actor David Carradine's mysterious death in 2009 created a flurry of speculation as to whether it was accidental asphyxiation, suicide, or even murder by the Chinese mafia.
The sudden deaths of actress Brittany Murphy and her husband in 2008 sparked online speculation about foul play, pre-existing medical conditions, and toxic mold.
Actor Brandon Lee was accidentally shot and killed on set while filming "The Crow" in March 1993. Could Brandon's death be connected to his father Bruce Lee's death?
Elliott Smith's death created instant controversy. The case remains open but theories suggest homicide with evidence pointing to his girlfriend as a suspect.
Avicii's sudden death at 28 years old shocked the music industry. Avicii, who had long struggled with mental health issues, took his own life, but not everyone is buying it.
Hollywood publicist Ronni Chasen was shockingly shot to death in the middle of Beverly Hills. Police claim robbery gone wrong, but the internet disagrees.
