Illegal immigration is a crime, hence the word "illegal".
Under
Title 8 Section 1325 of the U.S. Code, "Improper Entry by Alien," any citizen of any country other than the United States who:
Enters or attempts to enter the United States at any time or place other than as designated by immigration officers; or
Eludes examination or inspection by immigration officers; or
Attempts to enter or obtains entry to the United States by a willfully false or misleading representation or the willful concealment of a material fact;
has committed a federal crime.
Violations are punishable by criminal fines and imprisonment for up to six months. Repeat offenses can bring up to two years in prison. Additional civil fines may be imposed at the discretion of immigration judges, but civil fines do not negate the criminal sanctions or nature of the offense.
Why aren't all those caught over the years gone to prison if it is a criminal offense?
When they're caught they are imprisoned.
The US Justice Department reported that in 2003, alone, 270,000 illegal immigrants had served prison time. The Federation for American Immigration Reform reports: "In March 2000, Congress made public Department of Justice statistics showing that, over the previous five years, the INS had released over 35,000 criminal aliens instead of deporting them. Over 11,000 of those released went on to commit serious crimes, over 1,800 of which were violent ones; including 98 homicides, 142 sexual assaults, and 44 kidnappings. In 2001, thanks to a decision by the Supreme Court, the INS was forced to release into our society over 3,000 criminal aliens who collectively had been convicted of 125 homicides, 387 sex offenses, and 772 assault charges."
The Federal Bureau of Prisons estimates that fully one-third of current prison populations are comprised of non-citizen illegals.
Islamic terrorists, including Mexicans with terrorist ties, have entered and are continuing to enter the US via our unsecured borders.
The violent MS-13 Salvadoran gangs have illegally immigrated across the US-Mexico border. MS-13 has also vowed to kill local police, Border Patrol agents and US citizen-members of the Minutemen project, within the US.
Justice Dept. Figures on Incarcerated Illegals
Other Than Mexicans | Feature | Tucson Weekly
Newsweek National News - Newsweek.com
USATODAY.com - MS-13 gang growing extremely dangerous, FBI says
Gang will target Minuteman vigil on Mexico border - Washington Times