Accurate data on what the percentage is of illegal immigrants who commit violent crime is damn hard to find because the issue is so politicized. Personally, I've always thought the claim that illegals commit less violent crime than average US citizen was bullshit.
Here's some interesting statistical analysis that puts a big hole in that claim:
‐ California: In California, there were 28,030 inmates incarcerated for homicide and related offenses (first degree murder, second degree murder, manslaughter, and vehicular manslaughter) in December 2009. Using GAO’s 2008 estimate, there were approximately 2,430 illegal aliens imprisoned in California for homicide and related offenses. The total population of California was approximately 37 million, and the illegal alien population was approximately 2.5 million. Applying the same analysis as above, this yields an estimated rate of 97.2 illegal aliens imprisoned for homicide and related offenses per 100,000 illegal aliens, and 74.1 citizens and legal residents imprisoned for homicide and related offenses per 100,000 citizens and legal residents.
‐ Florida: Florida incarcerated 12,684 inmates for murder and manslaughter offenses in 2008–2009. Approximately 480 were illegal aliens. The total population of Florida was approximately 18.8 million and the illegal alien population was approximately 875,000. This yields an estimated rate of 54.85 illegal aliens imprisoned for murder and manslaughter per 100,000 illegal aliens, and 67.8 legal residents imprisoned for murder and manslaughter per 100,000 legal residents.
‐ New York: At the beginning of 2010, there were 10,254 prisoners incarcerated in New York for murder and manslaughter offenses (murder, first-degree manslaughter, second-degree manslaughter, other homicide). Approximately 1,350 were illegal aliens. The total population of New York was approximately 19.3 million, and the illegal alien population was approximately 800,000. This yields an estimated rate of 168.75 illegal aliens incarcerated for murder and related offenses per 100,000 illegal aliens, and 48.12 legal residents incarcerated for murder and related offenses per 100,000 legal residents.
‐ Texas: In Texas in 2008–2009, 16,178 people were incarcerated for homicide. Approximately 900 of them were illegal aliens. The total population of Texas was roughly 25 million, and the illegal alien population was roughly 1.65 million. This yields a rate of 54.54 illegal aliens incarcerated for homicide per 100,000 illegal aliens, and 65.43 legal residents incarcerated for homicide per 100,000 legal residents.
COMMENTS
‐ Taking the data only from these five states, and assuming that each person incarcerated for a homicide-related offense is responsible for only one death, yields 5,400 people killed by illegal aliens.[/b][/i]
https://www.nationalreview.com/corner/crime-illegal-immigration/