The death of Princess Diana in a car crash in 1997 shocked the world, and it didn't take long for conspiracy theories to emerge. Some believe that the British royal family, or other powerful figures, were involved in her death, due to her relationship with Dodi Fayed and her outspokenness on issues such as landmines. However, multiple investigations have concluded that the crash was a tragic accident, caused by the driver's intoxication and high speed.