After working on the border (South Florida) for many years. I can tell you with confidence that many illegal aliens that enter the US illegally have criminal backgrounds. Thousands of them have tattoos in the webbing of their hands between the thumb. They are marked with stars for multiple felonies that include Rape, Murder, and larceny. If you hire a person that you suspect may not be an American citizen but you feel they are grateful for work and they do a great job (no harm no foul) you might be harboring a dangerous felon and have compromised the safety of the community and your own families well being. Be smart, Americans.