Barry Latzer is an eminent criminologist and Professor Emeritus Professor of Criminology at John Jay College of Criminal Justice in New York City. In other words, an expert in his field. The only state that keeps remotely accurate records for illegal immigrant numbers is Texas, so he went to those statistics.
>Among all arrests for selected offenses over the period 2012 to 2017, illegal aliens were taken into custody for homicide (which includes murder and manslaughter) in numbers greater than their population size would predict. They accounted for nearly 10 percent of all apprehended killers, whereas, using the high-end DHS estimate, they make up 7.3 percent of the Texas population. For all other crimes, however, including burglary, drugs, theft, robbery, and weapons offenses, their apprehension percentages ranged from 2.5 to 6.7 percent—in other words, below their putative population size.
>The crime of homicide provides the most accurate measure, though, because a much higher proportion of murders are solved by police—around 70 percent—than for any other crime; by contrast, fewer than 15 percent of property offenses lead to an arrest. As a result, we have much more accurate demographics for murderers than for, say, burglars. The indication that illegal aliens commit disproportionate numbers of murders is corroborated by crime rates, shaky though they may be, for 2014 and 2015—the two years for which we have population estimates from Pew and DHS. In 2014, Texas illegal-alien murder-arrest rates were 4.99 per 100,000—56 percent higher than the rates for all other apprehended murderers (3.2 per 100,000). In 2015, the rates were 35 percent higher for illegal aliens (4.2 per 100,000, versus 3.1 per 100,000).