Muslim gypsies?
My wife and her mom were robbed by Romanian gypsies while traveling in Spain in 2007. Unbeknownst to them, the gypsies poked a hole in a tire on their rental car at a rest stop and then followed them down the highway and robbed them of money, camera and passports, when the tire went flat.
The Spanish cops were of little help. Threw up their hands and said they couldn't do much to help them.
They told my wife that they had dealt with so many crimes by the gypsies that remain unsolved that they hardly pursued them anymore. Why? Because few of these gypsies had permanent addresses, most had numerous aliases and they constantly moved around the country in groups fleecing the public, especially tourists, at will. And then just disappeared.