And laws that require local law enforcement to check residency status of those involved in investigations just make it more difficult to gather evidence against the criminals. Few undocumented immigrants are willing to work with local authorities to solve crimes if it means making their status known.
But threatening them with deportation doesn't work, either, when the safety of their loved ones is at stake.
The situation is untenable, and it points out the dangers of congressional inaction to reform the current broken immigration system. The political risk to politicians of taking on immigration law in an election year pales when compared to the very real physical and emotional dangers faced by undocumented immigrants every day.
Trying to work and support families in an unfamiliar country is difficult enough without also being forced to live in the shadows where criminals prey on those who are not protected by law.
A local investigation of a man suspected of sexually abusing young boys and forcing them to distribute drugs by threatening their families was successful because officers and community leaders built trust among immigrants.
Immigration and Customs Enforcement policies to protect those who testify or who help authorities investigate major crimes are a small step forward. But those policies can change case by case, and don't ensure the safety of most illegal immigrants.
Offering special visas to allow them to stay in the country is a temporary Band-Aid instead of what's really needed: major surgery to make the immigration system fair and workable for those already in this country who came or stayed without proper authorization.
The current laws are something like Prohibition in that they create an underground in which innocent people are victimized because of bad laws. It's unlikely anything will be accomplished in Congress anytime soon, and that is an unconscionable dereliction of duty.