Italy

Those with immigrant background are over-represented in Italian crime statistics.

According to the latest Ismu report as of January 1, 2021, there were 5,756,000 foreigners in Italy. Thus, 8.45 percent of the population who commit 30 percent of crimes show a propensity to crime about four times higher than Italians.
Source:  https://www.ismu.org/xxvii-rapporto-sulle-migrazioni-2021-comunicato-stampa-11-2-2022/#:~:text=XXVIIRAPPORTOISMUSULLEMIGRAZIONI2021&text=Milano11febbraio2022.,2020(28)
Illegal immigrants are 14 times more likely to commit crime, excluding obviously issues related to the status of illegal.
Source:  https://www.confcommercio.it/documents/10180/3599445/Nota+descrittiva+su+criminalit%c3%a0%20e+immigrazione/dcd0881d-e752-430e-9f03-2efb5fdef9eb

A study of immigration to Italy during the period 1990–2003 found that the size of immigrant population is positively correlated with the incidence of most types of crime, as well as with the overall number of criminal offenses. However, the causal effect seem limited to some categories of crime: murders, robberies, sexual crimes and thefts.
Source:  Bianchi, Milo; Buonanno, Paolo; Pinotti, Paolo (1 December 2012). "Do Immigrants Cause Crime?" (PDF). Journal of the European Economic Association. 10 (6): 1318–1347. doi:10.1111/j.1542-4774.2012.01085.x
According to the latest report by Idos/Unar, immigrants made up 32.6% of prison population in 2015, immigrants making up 8.2% of population in 2015
Source:  "Gli stranieri? Delinquono di meno e commettono reati meno gravi degli italiani". Redattore Sociale (in Italian)
Indicatori demografici". www.istat.it. 12 February 2015.

According to a 2013 report, "undocumented immigrants are responsible for the vast majority of crimes committed in Italy by immigrants... the share of undocumented immigrants varies between 60 and 70 percent for violent crimes, and it increases to 70–85 for property crime. In 2009, the highest shares are in burglary (85), car theft (78), theft (76), robbery (75), assaulting public officer / resisting arrest (75), handling stolen goods (73)." This 2013 report notes that "immigrants accounted for almost 23 percent of the criminal charges although they represented only 6‐7 percent of the resident population" in 2010
Source:  "Immigration policy and crime" (PDF). 2013. Archived from the original (PDF) on 2 February 2016 – via Fondazione Rodolfo Debenedetti.

According to data from the Interior Ministry in Italy, 42% of rapes are committed by immigrants, despite accounting for approximately 8% of the population
https://www.ilgiornale.it/news/napoli/sequestra-e-violenta-17enne-arrestato-extracomunitario-1795270.html

13-Year-Old Girl Raped by 7 Egyptian Migrants in Sicily, Italy in 2024
https://www.moroccoworldnews.com/2024/02/360609/italy-13-year-old-girl-raped-by-7-egyptian-migrants
and
https://www.dailymail.co.uk/news/article-13050769/The-gang-rape-horror-reignited-Italys-immigration-row-Degrading-attack-13-year-old-youths-illegally-entered-country-minors-poured-fuel-flames-migrant-crisis.html

 

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