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the claim

American sanctuary cities breed crime

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 3 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that American sanctuary cities breed crime?

No. Empirical studies consistently find that the adoption of sanctuary city policies does not increase crime rates or threaten public safety.

Verdict: REFUTED · 0 sources for, 3 against · Last checked

The analysis

The provided research papers (such as Martinez et al., 2017; Wong, 2020; and Chiricos et al., 2023) directly test the claim that sanctuary policies increase crime and find no evidence supporting it, reporting instead a null or non-significant relationship. Therefore, the claim is refuted by the available empirical evidence.

Evidence against · 3
Providing Sanctuary or Fostering Crime? A Review of the Research on “Sanctuary Cities” and Crime​
2017
This literature review finds either a null or negative relationship between sanctuary policies and crime rates.
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Martínez, D. E., Martínez‐Schuldt, R. D., & Cantor, G. (2017). Providing Sanctuary or Fostering Crime? A Review of the Research on “Sanctuary Cities” and Crime​. doi.org. https://doi.org/10.1111/soc4.12547

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More against · 2
Sanctuary policies reduce deportations without increasing crime.
2020
This empirical study evaluates ICE and FBI data and concludes that sanctuary policies do not have any detectable effect on crime rates.
Get citation
DK, H. (2020). Sanctuary policies reduce deportations without increasing crime.. doi.org. https://doi.org/10.1073/pnas.2014673117

Federal-Local Partnerships on Immigration Law Enforcement: Are the Policies Effective in Reducing Violent Victimization?
2023
This study finds that anti-detainer policies (sanctuary policies) show no significant impact on violent victimization risk.
Get citation
Baumer, E. & Xie, M. (2023). Federal-Local Partnerships on Immigration Law Enforcement: Are the Policies Effective in Reducing Violent Victimization?. doi.org. https://doi.org/10.1111/1745-9133.12619

What does the evidence say?

The provided research papers (such as Martinez et al., 2017; Wong, 2020; and Chiricos et al., 2023) directly test the claim that sanctuary policies increase crime and find no evidence supporting it, reporting instead a null or non-significant relationship. Therefore, the claim is refuted by the available empirical evidence.

Receipt History
first checked04 Aug 2026
judged → REFUTED · 1004 Aug 2026
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This receipt is an automated verdict against our published method · not an opinion about any author or publication.
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