Spain

Those with immigrant background are over-represented in Spanish crime statistics.
A 2008 study finds that the rates of crimes committed by immigrants are substantially higher than nationals
Source:  Alonso, Cesar; Garoupa, Nuno; Perera, Marcelo; Vazquez, Pablo (1 January 2008). "Immigration and Crime in Spain, 1999–2006". Working Papers. FEDEA.

The Madrid train Bombings in 2004 was carried out by migrants
https://www.google.com/search?&q=Madrid+train+bombings+of+2004.

Data from the National Statistics institute in Spain show that the majority (52.17%) of convicted rape arrests are foreign nationals (11.39%). Africans commit 20% of the sexual assaults in the country despite the fact that, demographically, they only account for 2.4% of the population

.