How does the 287(g) program change local police cooperation with ICE and Border Patrol?

Checked on January 20, 2026
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Executive summary

The 287(g) program formally deputizes designated local officers to perform specific immigration-enforcement functions on behalf of ICE, bringing federal authority into jails and, in some models, onto the street—changing everyday policing by adding immigration identification, detention, and referral to the officers’ responsibilities [1] [2]. Supporters say it targets serious criminals and strengthens public safety, while critics contend it blurs community policing, encourages racial profiling, and chills immigrant cooperation with police [1] [3] [2].

1. What the program legally does: delegation of federal immigration authority

Under 287(g), ICE signs memoranda of agreement with local agencies that delegate limited immigration-enforcement powers to trained and certified local officers—powers that include questioning immigration status, issuing detainers, and initiating removals—effectively allowing local agencies to act as agents of federal immigration enforcement under ICE oversight [1] [2] [4].

2. How it changes routine police work: models, scope, and street-level enforcement

Practically, the program can alter routine policing depending on the model adopted: the Warrant Service Officer (WSO) model formalizes jail-based enforcement while the Task Force Model authorizes officers to enforce immigration law during everyday encounters like traffic stops or DUIs, turning stop-and-book workflows into potential immigration-screening events [5] [1] [4] [6].

3. Operational mechanics: training, oversight, data-sharing and incentives

Local officers must receive ICE training and periodic refreshers to retain delegated authority, and agencies become part of information-sharing practices—daily booking lists and data feeds are common—while recent federal incentives include reimbursement programs aimed at expanding participation and providing federal tools to partner agencies [7] [8] [9].

4. The effect on cooperation between local police and Border Patrol/ICE

287(g) institutionalizes closer, bidirectional cooperation: local agencies gain authority and resources to identify removable noncitizens and can hand cases or detainees to ICE, while ICE extends its enforcement reach through local manpower and intelligence streams, producing a tighter operational integration than informal ad hoc contacts [1] [10] [11].

5. Consequences for community policing and public safety trade-offs

Multiple independent observers and studies report that when police enforce immigration law, immigrant communities are less likely to report crimes or cooperate with investigations—erosion of trust that undermines traditional public-safety goals—while civil-rights groups warn of increased stops, harassment, and racial profiling tied to deputized enforcement [2] [12] [3].

6. Political context, scale and contested narratives

The program’s expansion under recent administrations and state directives—marked by a rapid increase in formal agreements and public campaigns encouraging sheriff participation—has sharpened political stakes: DHS and proponents frame 287(g) as necessary to remove dangerous criminals and protect communities, while advocates and civil-rights organizations characterize it as a tool that turns local police into deportation agents and pressures jurisdictions into participation [13] [14] [1] [3].

7. Where reporting diverges and limits of the sources

Available reporting converges on the program’s mechanics and its chilling effect on immigrant cooperation, but empirical disputes remain about net public-safety benefits versus harms: ICE and DHS emphasize removals of serious offenders and operational efficiencies, whereas civil-justice groups and some policing associations point to lowered crime reporting and civil-rights harms; the provided sources document both positions but do not produce a unified causal estimate of public-safety outcomes [1] [2] [3].

Want to dive deeper?
How have crime-reporting rates changed in jurisdictions before and after adopting 287(g) agreements?
What oversight mechanisms and accountability records exist for misuses of 287(g)-delegated authority?
How do alternative federal-local immigration partnerships (like CAP or Secure Communities) differ from 287(g) in practice?