There are crime sweeps with varying degrees of success held in Cities across the Nation they would be needed less if Cities like San Diego, Los Angeles, and San Francisco were not run and controlled by City Councils and Mayors who violate the law and their oath of office by presiding over sanctuary Cities that serve no good purpose and only invite crime.
Generally speaking, crime sweeps are the least effective form of enforcement that require the most man-hours of police time. They alienate the local community upon whose goodwill the officers depend. They increase the likelihood that innocent people will be swept up and mistreated.
I'm a pro law & order girl, but some police strategies work better than others. What works the best is to focus your time, energy, and resources on the individuals who are most likely to commit crimes in the area. Only a small percentage of residents in a local area are likely to commit serious crimes. Sweeps disburse resources that could be targeted in on violent offenders.
One of the ways you can measure the effectiveness of a particular police department is through cleared case rates. Arpaio has one of the lowest clearance rates in the U.S. What that means is that the people who have actually committed car thefts, burglaries, and the like, and who often specialize in those kinds of crimes, are getting away with their misdeeds. I'd far rather live in a city with solid crime clearance rates and zero sweeps. The crime rate will be lower.
Building solid investigative cases against criminals, and sending them to prison for appropriate lengths of confinement is actually the best use of officer man-hours, in my experience.
The Mexican Drug Cartels have partnered up with local gangs and even national gangs and threaten the peace not only alone the Border but in every town in America, and the attitude that illegals are just here to work and make a better life is one really stupid ignorant thing to say.
IN my experience, there are two groups of illegal immigrants: those who are here to work, and those who are here to commit crimes. Those who are here to commit crimes should be arrested and incarcerated. Those who are here to work should be deported.
We are Nation of laws and those like Janet Napolitano and Obama and others who don't want the laws enforced because they claim some BS about tolerance are part of the problem and are in violation of their oath of office.
In his zeal to do their jobs, Joe Arpaio is abdicating his elected responsibilities.
Here's a rule of thumb I've always found handy when it comes to these sorts of things....make sure your own house is clean before you start worrying about the dust under someone else's bed. In Joe Arpaio's case, his own house is damned dirty.