A Real Cracker of a Story!!!
Prince Felix Yusupov and his wife, Princess Irina Alexandrovna,  1913It's pretty rare that you have a first hand  account of such a momentous (and usually private) event as the murder of  Grigori Rasputin in 1916.
Grigori RasputinIt has always been  well-known that Prince Felix Yusupov (married to Princess Irina  Alexandrovna, niece of Tsar Nicholas II) and Grand Duke Dmitri  Pavlovitch Romanov (a second cousin of the Tsar) were directly involved  in the assassination.
Grand Duke Dmitri Pavlovitch Romanov
Grand Duke Dmitri Pavlovitch Romanov, his wife, American  heiress,
Audrey Emery and their son PaulWhat is  considerably less well-known is that both the Prince and the Grand Duke  were gay ... and there is 
much  speculation about a supposed relationship between them.
Prince  Felix made no secret of being gay, speaking quite candidly for example  about wearing women's clothing in his autobiography '
Lost  Splendor'. But for the usual dynastic reasons of the period, he  married and produced heirs.
Grand Duke Dmitri was far more  circumspect about his sexuality. He was bisexual and had affairs with  many women, including the famed Russian ballerina and early film actress  Vera Karalli.
Vera Karalli
Vera KaralliFollowing Rasputin's death,  Prince Felix was under virtual house arrest on the family estate outside  St  Petersburg. After WW I, he left Russia, finally settling in Paris  in 1920.
To void arrest, Grand Duke Dmitri was sent to the  Persian front (didn't know there was one!) and so became one of the few   Romanovs survive the Russian Revolution.
The Prince and the  Grand Duke met up in London in 1919, but fell out over Felix's  open   boasting of his part in the killing of the mad monk. And because open  association with the Prince might damage the Grand Duke's claim to the  throne in any restoration of the monarchy.
After working as a  champagne salesman in Paris (no cab driving jobs I guess), the Grand  Duke married American heiress Audrey Emery in 1927 and their son, HSH  Prince Paul Romanovsky-Ilyinsky, later became Mayor of Palm Beach,  Florida.
Hear of any sightings Alan?
But there's more.
In  1967, Prince Felix and his wife gave an interview to French television.  It was in the promotion of a new film on the events of 16/17 December  1916 - 
'J'ai tué Raspoutine' ('I Killed Rasputin') - a film  which the couple say is the first true account of the events which took  place.
A  story with everything but the kitchen sink thrown in!
The  interview is in French but a version with English subtitles can be seen  on 
You Tube.