
Arizona's SB 1070, also known as the Support Our Law Enforcement and Safe Neighborhoods Act, sparked widespread controversy and protests upon its enactment in 2010. The law, which made it a state misdemeanor for illegal immigrants to be in Arizona without carrying registration documents, was challenged by the ACLU and the US Department of Justice on constitutional grounds. The law has been criticised for violating the Fourth Amendment, which prohibits unreasonable searches and seizures, and for encouraging racial profiling and discrimination against Latinos and other minority groups. While some provisions of SB 1070 have been blocked or struck down by lower courts, the controversial show me your papers provision remains in effect, allowing law enforcement officers to investigate the immigration status of individuals they suspect are undocumented. This has raised concerns about potential civil rights violations and the law's conflict with federal immigration laws, leading to ongoing legal challenges and debates over its constitutionality.
| Characteristics | Values |
|---|---|
| Violates the Supremacy Clause | Attempts to bypass federal immigration law |
| Violates the Fourteenth Amendment and Equal Protection Clause | Racial and national origin minorities are subjected to stops, detentions, and arrests based on their race or origin |
| Violates the First Amendment | Exposes speakers to scrutiny based on their language or accent |
| Violates the Fourth Amendment | Allows for warrantless searches in the absence of probable cause |
| Violates the Fourth Amendment | Prolonging a stop to conduct an immigration check |
| Violates the Fourth Amendment | Unreasonable searches and seizures |
| Violates the Fourth Amendment | Prolonging a stop to pursue unrelated, non-criminal investigations |
| Encourages racial profiling | Latinos and others who may look or sound "foreign" are targeted |
| Violates the legislative power of Congress | States cannot govern when and how immigrants must register with the federal government |
| Violates federal law | Requires legal immigrants to carry registration documents at all times |
| Violates federal law | Allows state police to arrest any individual suspected of being an illegal immigrant |
| Violates federal law | Makes it a crime for an illegal immigrant to search for or hold a job in the state |
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What You'll Learn

Violation of the Fourth Amendment
The Fourth Amendment of the US Constitution protects people from "unreasonable searches and seizures". In the context of SB 1070, this amendment has been cited as a potential violation in several instances.
One of the most notable examples is the "show me your papers" provision, which requires law enforcement officers to determine a person's immigration status during a stop, detention, or arrest if there is reasonable suspicion that the individual is in the country illegally. Critics argue that this provision leads to racial profiling and unreasonable searches and seizures. The Supreme Court upheld this provision, deciding that it was not preempted by federal law. However, lower courts in Arizona and other states had blocked it until the Supreme Court's decision.
In addition, SB 1070 authorized warrantless arrests of individuals suspected of being in the country illegally based on probable cause. This provision was also struck down by the Supreme Court as being preempted by federal law.
Another example of a potential Fourth Amendment violation is the requirement for legal immigrants to carry registration documents at all times. This provision was also struck down by the Supreme Court.
Furthermore, SB 1070 allowed law enforcement officers to perform a traffic stop on any motor vehicle based on reasonable suspicion that any occupant was violating civil traffic law. This provision has been criticised as a potential violation of the Fourth Amendment, as it could lead to unreasonable searches and seizures.
In practice, there have been instances where individuals have had their Fourth Amendment rights violated due to SB 1070. For example, David Green was pulled over for a traffic stop and the officer unconstitutionally prolonged the stop to conduct an immigration check, even though Mr Green was neither arrested nor suspected of being in the country unlawfully. This prolonged detention violated the Fourth Amendment's prohibition of unreasonable seizures.
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Violation of the Fourteenth Amendment
Arizona's SB 1070, also known as the "Support Our Law Enforcement and Safe Neighborhoods Act", has been the subject of intense controversy and legal challenges since its passage in 2010. One of the key concerns surrounding the bill is its potential violation of the Fourteenth Amendment of the US Constitution.
The Fourteenth Amendment guarantees equal protection under the law, ensuring that no state shall "deny to any person within its jurisdiction the equal protection of the laws". Challengers of SB 1070 argue that the bill violates this amendment by targeting racial and national origin minorities for stops, detentions, and arrests based on their perceived race or ethnicity. This perception has led to the racial profiling of Latinos and others who may look or sound "foreign", including many US citizens.
The infamous "show me your papers" provision, which requires law enforcement officers to determine an individual's immigration status during a "lawful stop, detention, or arrest" if they suspect the person is an illegal immigrant, has been particularly contentious. This provision has been blocked by lower courts in Arizona and other states, but the US Supreme Court upheld it, stating that it was not preempted by federal law. However, the Court also acknowledged that the provision may still be found unconstitutional on other grounds in the future.
The prolonged detention of individuals for immigration checks, beyond what is necessary for the original stop, has been cited as a violation of the Fourth Amendment, which prohibits unreasonable searches and seizures. This violation further exacerbates the concerns about racial profiling and discrimination against minorities, as protected by the Fourteenth Amendment.
The Supreme Court's decision on SB 1070 has been met with strong criticism from civil rights organizations such as the ACLU, who argue that the law violates cherished civil rights and should be struck down entirely. They continue to work with law enforcement agencies to develop clear immigration-related enforcement policies that protect the civil rights of all community members.
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Violation of the Supremacy Clause
The Supremacy Clause of the US Constitution establishes the primacy of federal law over state laws. In the case of Arizona SB 1070, the federal government argued that the law usurped its authority to regulate immigration laws and enforcement.
The Supremacy Clause was cited by the US Department of Justice (DOJ) in its lawsuit against the state of Arizona. The DOJ argued that SB 1070 would interfere with federal enforcement of immigration law, specifically compromising the efforts of Immigration and Customs Enforcement (ICE). The DOJ also contended that the law would result in the harassment and detention of individuals who are legally present in the United States.
The ACLU and other advocacy groups also challenged SB 1070 on the basis of the Supremacy Clause, arguing that it violated the clause by attempting to bypass federal immigration law. They asserted that the law gave state law enforcement officers excessive powers to violate the civil rights of US citizens, particularly through racial profiling. The “show me your papers” provision of SB 1070, which allowed officers to demand documentation of legal residency, was seen as discriminatory and inviting racial profiling of Latinos and individuals who may look or sound "foreign."
In June 2012, the US Supreme Court ruled on Arizona v. United States, upholding one provision of SB 1070 while striking down three others as violations of the Supremacy Clause. The Court agreed that immigration status checks during law enforcement stops were permissible, but it overturned provisions that required legal immigrants to carry registration documents at all times, allowed state police to arrest individuals suspected of being illegal immigrants, and made it a crime for illegal immigrants to seek or hold a job.
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Violation of the First Amendment
The Support Our Law Enforcement and Safe Neighborhoods Act, introduced as Arizona Senate Bill 1070 (SB 1070), has been criticised for violating the First Amendment rights of freedom of speech. The bill made it a state misdemeanour for an illegal immigrant to be in Arizona without carrying the required documents, and required law enforcement officers to determine an individual's immigration status during a "lawful stop, detention or arrest" if there was reasonable suspicion that the individual was an illegal immigrant.
This led to concerns that the bill would expose speakers to scrutiny based on their language or accent, and that it would invite racial profiling of Latinos and others who may look or sound "foreign", including many US citizens. The bill was also criticised for potentially violating the civil rights of some US citizens and for usurping the federal government's authority to regulate immigration laws and enforcement.
The American Civil Liberties Union (ACLU) has challenged the constitutionality of the bill, arguing that Arizona officers cannot prolong a stop to conduct an immigration check. In the case of David Green, an officer unconstitutionally prolonged a traffic stop to conduct an immigration check, violating the Fourth Amendment, which prohibits unreasonable searches and seizures.
The Supreme Court upheld SB 1070's "show me your papers" provision, deciding that it is not preempted by federal law. However, lower courts in Arizona and other states have blocked similar provisions. The widespread harms caused by these laws have led legislators in many states to distance themselves from this discriminatory model.
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Violation of civil rights
The Arizona SB 1070, also known as the "Support Our Law Enforcement and Safe Neighborhoods Act", has been a subject of intense debate and legal challenges since its passage in 2010. The law has been criticised for potentially violating civil rights and encouraging racial profiling, sparking protests and legal action from civil rights organisations.
One of the most controversial aspects of SB 1070 is the “show me your papers” provision, which authorises law enforcement officers to demand proof of citizenship or immigration status from individuals they suspect of being in the country unlawfully. This provision has been challenged as a violation of the Fourth Amendment, which protects against unreasonable searches and seizures. In the case of David Green, for example, the ACLU argued that Green's Fourth Amendment rights were violated when he was unconstitutionally detained for an immigration check during a traffic stop, even though he was neither arrested nor suspected of being in the country illegally.
SB 1070 has also been criticised for violating the Fourteenth Amendment and the Equal Protection Clause by subjecting individuals to stops, detentions, and arrests based on their race or national origin. The law has been accused of inviting racial profiling of Latinos, Native Americans, Asian Americans, and others who may look or sound "foreign," including US citizens. This aspect of the law has been challenged as a violation of civil rights and equal protection under the Fourteenth Amendment.
Additionally, SB 1070 has been challenged for violating the First Amendment by exposing speakers to scrutiny based on their language or accent. The law's requirement for legal immigrants to carry registration documents at all times has also been criticised as more stringent than federal law, potentially leading to illegal arrests and violations of civil liberties.
While some provisions of SB 1070 have been struck down by the courts, including the US Supreme Court, the “show me your papers” provision remains in effect. Civil liberties organisations like the ACLU continue to work to protect the rights of individuals impacted by this law and to challenge its constitutionality.
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Frequently asked questions
SB 1070, also known as the "Support Our Law Enforcement and Safe Neighborhoods Act", is a legislative act in the U.S. state of Arizona that was passed in 2010. It is considered the broadest and strictest anti-illegal immigration law in the United States.
The United States Justice Department challenged SB 1070 as usurping the federal government's authority to regulate immigration laws and enforcement, violating the federal Supremacy Clause. The law was also challenged on the basis of violating the Fourteenth Amendment and the Equal Protection Clause, the First Amendment, and the Fourth Amendment.
The Court struck down three of the four provisions of SB 1070, including Sections 3, 5(C), and 6. These provisions required legal immigrants to carry registration documents at all times, allowed state police to arrest individuals suspected of being illegal immigrants, and made it a crime for illegal immigrants to seek or hold a job.
The Supreme Court upheld the "show me your papers" provision of SB 1070, allowing Arizona law enforcement officers to investigate the immigration status of individuals if there is reasonable suspicion that they are in the country illegally. However, the Court blocked key provisions of the law, including the requirement for immigrants to carry registration documents and the authorization of warrantless arrests of suspected illegal immigrants.
There are ongoing concerns about racial profiling and discrimination as a result of SB 1070, particularly against Latinos and other individuals who may look or sound "foreign". Legal challenges to SB 1070 and similar laws in other states continue on various constitutional grounds, including the Fourth Amendment prohibition of unreasonable searches and seizures.

























