of princess latifa, who claimed she was being held captive by her father, the ruler of dubai, sheik mohammedvidence. special correspondent nawal al—maghafi reports. sheikh mohammed rashid al maktoum. the billionaire ruler of dubai, and one of the most powerful men in the middle east. last week, the bbc released secret recordings of his daughter, princess latifa. in them, she claims he is responsible for her abduction and imprisonment. the messages sparked international concerns. but latifa is not the only daughter of to try to escape. 20 years ago, her sister shamsa ran away from the family estate in surrey. in 2000, my sister shamsa, while she was on holiday in england, she was 18 years old, going on 19. she ran away. so, yeah, after two months, they found her. the police launched an investigation, but it hit a dead end. now the bbc has obtained exclusive letter written by princess latifa from her captivity. in it, a plea to reopen her sister's case. the letter, delivered by her friends yesterday to cambridgeshire police, says... we have pieced together shamsa's extraordinary story. she was