David Frum: Immigration Enforcement is Important to Stopping Gangs
"We're talking here about arrested illegals. These are not "good citizens" (or even, hem, good non-citizens). They have come within the ambit of law enforcement by violating some law: drunk driving for example. It's then and only then that police run the check to see whether the arrested person might have violated other laws too. It's a lot more efficient way to proceed than waiting until after the arrested person has macheted somebody to death," says David Frum of running status checks on people in custody.
"As with New York City's gun checks at traffic stops in the 1990s, immigration status checks upon arrest enable law enforcement to change the environment that supports widespread criminality."