D.C. leaders have said President Donald Trump’s deployment of federal law enforcement across the District has had some impact on crime, but as the 30-day takeover expires, the News4 I-Team found questions about whether that progress is sustainable.

Thomas Abt, a national expert in crime reduction and the author of “Bleeding Out: The Devastating Consequences of Urban Violence and a Bold New Plan for Peace in the Streets,” tells the I-Team these types of law enforcement surges aren't likely to have long-lasting impact on crime without long-term investments in communities.

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“The research shows that federal or other surges like this or crackdowns may have a temporary effect, and you are seeing some temporary reductions in cr

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