People tend to live around people with similar backgrounds. Are illegals more likely or less likely to report if they have been a crime victim than legal US residents? I would have to guess that they are less likely to report if they have been a victim of a crime.
https://bjs.ojp.gov/press-release/criminal-victimization-2022
Although the percentage of violent victimizations reported to police in 2022 (42%) was not statistically different from 2021, there were some significant decreases in reporting for certain types of crime. For example, reporting of assaults overall fell from 46% to 41% of victimizations from 2021 to 2022, partly due to reduced reporting of aggravated assaults (from 61% to 50%). Declines were also observed in the percentage of stranger violence (from 48% to 36% of victimizations) and violent crime with a weapon (from 61% to 52%) reported to police.
Households in the United States experienced 13.4 million property victimizations in 2022, up from 11.7 million in 2021 but similar to the number in 2018. Property crime includes burglary, trespassing, motor vehicle theft, and other types of household theft. Motor vehicle theft victimization increased from a rate of 4.3 victimizations per 1,000 households in 2021 to 5.5 per 1,000 in 2022.
https://bjs.ojp.gov/press-release/criminal-victimization-2019
Based on the 2019 survey, less than half (41%) of violent victimizations were reported to police. The percentage of violent victimizations reported to police was lower for white victims (37%) than for black (49%) or Hispanic victims (49%).
In 2019, there were 5.4 million total violent incidents involving victims age 12 or older. The portion of violent incidents involving black offenders (25%) was 2.3 times the portion involving black victims (11%), while the portion involving white offenders (50%) was 0.8 times the portion involving white victims (62%) and the portion involving Asian offenders (1.0%) was 0.4 times the portion involving Asian victims (2.3%).
The 2019 survey found that an estimated 12.8 million U.S. households experienced one or more property victimizations, which include burglaries, residential trespassing, motor vehicle thefts and other thefts. The rate of property crime declined 6% from 2018 (108.2 victimizations per 1,000 households) to 2019 (101.4 per 1,000).