Immigration Reduces Crime Rates - per study

Texas estimates that of 21,000,000 residents approximately 1,500,000 are undocumented immigrants. 7.14%

Total Texas Department of Criminal Justice population 151, 852 of which 6.76% are
Offenders Claiming Foreign Citizenship (10,280)

Claiming Foreign Citizenship does not mean they are illegal immigrants. So, the percentage of illegals in Texas prisons is notably less than the percentage of illegal immigrants in Texas' overall population.