"Illegal immigrant" appears 4 times in the article. Not ever just immigrant, but specifically illegal immigrant. Immigrant and illegal immigrant are two separate categories. Why leave out the illegal part? What's the objective in that?
Well, one of the docs I linked to said the rate for illegal and documented immigrants were similar.
Here is a pdf from the House.gov"
An NIJ-funded study examining data from the Texas Department of Public Safety estimated the rate at which undocumented immigrants are arrested for committing crimes. The study found that undocumented immigrants are arrested at less than half the rate of native-born U.S. citizens for violent and drug crimes and a quarter the rate of native-born citizens for property crimes.[1] ....
Still, undocumented immigrants had the lowest homicide arrest rates throughout the entire study period, averaging less than half the rate at which U.S.-born citizens were arrested for homicide.[3] (The homicide rate for documented immigrants fluctuated. Sometimes it was higher than the rate for U.S.- born citizens and sometimes it was lower.) Every other violent and property crime type the researchers examined followed the same general pattern. The offending rates of undocumented immigrants were consistently lower than both U.S.-born citizens and documented immigrants for assault, sexual assault, robbery, burglary, theft, and arson. For drug offenses, too, undocumented immigrants were less than half as likely to be arrested as native-born U.S. citizens.[4] Moreover, the drug crime arrest rate for the undocumented population held steady throughout the seven years of data, while the rate for native-born citizens increased almost 30% during that time. As a result, undocumented immigrants had a smaller share of arrests for drug crimes in 2018 than they had in 2012.
Researchers also looked specifically at homicide arrest trends. These rates tend to fluctuate more than the overall violent crime arrest rates because murders are relatively rare compared to other crimes. In addition, a large share of homicides go unsolved. Still, undocumented immigrants had the lowest homicide arrest rates throughout the entire study period, averaging less than half the rate at which U.S.-born citizens were arrested for homicide.[3] (The homicide rate for documented immigrants fluctuated. Sometimes it was higher than the rate for U.S.- born citizens and sometimes it was lower.) Every other violent and property crime type the researchers examined followed the same general pattern. The offending rates of undocumented immigrants were consistently lower than both U.S.-born citizens and documented immigrants for assault, sexual assault, robbery, burglary, theft, and arson.
This paper dealt with undocumented crime:
But political scapegoating and hyperbole are no substitute for scientific evidence. Since the early 1990s, as the immigrant population (especially the undocumented population) increased sharply to historic highs, the rates of violent crimes and property crimes in the United States decreased significantly, in some instances to historic lows—as measured both by crimes reported to the police and by national victimization surveys. Moreover, data from the census and a wide range of other empirical studies show that for every ethnic group without exception, incarceration rates among young men are lowest for immigrants, even those who are the least educated. This holds true especially for the Mexicans, Salvadorans, and Guatemalans, who make up the bulk of the undocumented population. These patterns have been observed consistently over the last three decennial censuses, a period that spans the current era of mass immigration, and recall similar national-level findings reported by three major government commissions during the first three decades of the twentieth century, as did another U.S. commission in the 1990s.....