Study: Militarization of police does not reduce crime

A new look at existing data by LSU researchers refutes the Trump administration's claims.

Study: Militarization of police does not reduce crime
Credit: Megan Varner/Getty
  • The United States Department of Defense gifts surplus military equipment and clothing to local police departments.
  • The militarization of police coincides with a significant loss of trust in law enforcement from the American public.
  • Militarized police departments are more likely to interact violently with their communities.

Watching coverage of protests in American streets, many of us have been shocked to witness what modern policing often looks like. Even putting aside the reason for many of these demonstrations in the first place—allegations of police brutality—what we see onscreen marching towards protestors is chilling. We witness police garbed in helmets, flak jackets, tactical dress, and carrying assault rifles, backed by weaponry designed for the battlefield, not the nation's thoroughfares.

The primary source of this equipment and clothing is the Federal government's 1033 program, which has been described as "Uncle Sam's Goodwill Store." This surplus military equipment (SME)—or "reutilized" gear as the Department of Defense (DOD) calls it—is granted, for free, to local law enforcement agencies, or "LEAs." WIRED estimates the Pentagon has gifted to local police some $7.3 billion worth of military equipment and clothing.

Concerned about the manner in which this militarization has affected policing, and following 2014's Ferguson protests, President Obama curtailed the program. The Trump administration removed these limits in 2017, claiming research had proved militarization reduces crime.

A new study from Louisiana State University (LSU) revisits that research, finding it incomplete and inconsistent. The researchers, led by LSU political scientist Anna Gunderson, collected their own more comprehensive and accurate data and concluded that militarizing local police does not actually reduce crime.

A wide lack of support

Credit: Andrew Caballero-Reynolds/Getty Images

It's no wonder that more than half of the American public no longer trusts the police. It's hard not to get the impression that for many police departments, the mission has changed from one of support for its communities to an attempt to intimidate and dominate its members.

Studies back this up. Police whose departments use military equipment are more often violent with community members and are more likely to kill them. Neither is this a small problem at the margins of policing: Over 1,000 people are killed by police annually.

In spite of the Trump administration's faith in the soundness of the 1033 program, others from across the political spectrum disagree. On the right, the Charles Koch Foundation asserts, "This erosion of public confidence in law enforcement and low support for militarization impedes law enforcement's ability to effectively secure public safety." From the left, the American Civil Liberties Union says, "We advocate for a return to a less dangerous, more collaborative style of policing. We should not be able to mistake our officers for soldiers."

Sketchy records

The Pentagon

Credit: JeremyAdobe Stock

Gunderson explains to LSU Media Center that, "scholars rely on accurate data to track and analyze the true effect of police militarization on crime. Policymakers also need accurate data to base their decisions upon. However, to-date, we do not have reliable data on SME transfers to local police and sheriffs through the federal government."

The research cited by the Trump administration was a study done by the American Economic Association based on SME data collected through a 2014 Freedom of Information Act request. Having a look at that data themselves, along with other FOIA 2014 data released by National Public Radio and newer data from 2018, the LSU researchers found that things didn't quite line up. Where FOIA suggests certain counties received SME, NPR's data showed no such transfer. Similarly, NPR reported departments receiving items such as weapons, grants that were not reflected in the 2018 data as expected.

"When we looked at the data and ran the replications, nothing looked like the results being cited by the Trump Administration," Gunderson recalls. "We spent a year trying to diagnose the problem."


The LSU researchers' conclusion was the the previously released SME data from the DOD was too inconsistent to produce reliable insights. They conducted their own analysis, aligning newer data with country-level LEA data, to derive a cohesive, accurate picture that allowed them to more definitively assess who got SME transfers and who didn't, and what effect it had on local crime statistics.

They found no indication that SME transfers led to a reduction in crime. The study concludes, "we find no evidence that federal distributions of SME to local LEAs across the United States reduce crime rates, neither violent nor nonviolent crime rates, in the jurisdictions that receive it."

Gunderson adds:

"This is a cautionary tale about the importance of oversight. The most important thing for policymakers and the public to know is that you can't justify giving surplus military equipment to police departments on the grounds it will lead to a reduction in crime. There is no evidence for that. You can't claim this program is important because it reduces crime."

What's more says, the report, "because of serious data problems and debatable methodological choices in prior studies, the empirical foundations on which social scientists, along with policymakers and the public, stand when making causal claims about the effects of the transfers of SME may be no firmer than quicksand."

A landslide is imminent and so is its tsunami

An open letter predicts that a massive wall of rock is about to plunge into Barry Arm Fjord in Alaska.

Image source: Christian Zimmerman/USGS/Big Think
Surprising Science
  • A remote area visited by tourists and cruises, and home to fishing villages, is about to be visited by a devastating tsunami.
  • A wall of rock exposed by a receding glacier is about crash into the waters below.
  • Glaciers hold such areas together — and when they're gone, bad stuff can be left behind.

The Barry Glacier gives its name to Alaska's Barry Arm Fjord, and a new open letter forecasts trouble ahead.

Thanks to global warming, the glacier has been retreating, so far removing two-thirds of its support for a steep mile-long slope, or scarp, containing perhaps 500 million cubic meters of material. (Think the Hoover Dam times several hundred.) The slope has been moving slowly since 1957, but scientists say it's become an avalanche waiting to happen, maybe within the next year, and likely within 20. When it does come crashing down into the fjord, it could set in motion a frightening tsunami overwhelming the fjord's normally peaceful waters .

"It could happen anytime, but the risk just goes way up as this glacier recedes," says hydrologist Anna Liljedahl of Woods Hole, one of the signatories to the letter.

The Barry Arm Fjord

Camping on the fjord's Black Sand Beach

Image source: Matt Zimmerman

The Barry Arm Fjord is a stretch of water between the Harriman Fjord and the Port Wills Fjord, located at the northwest corner of the well-known Prince William Sound. It's a beautiful area, home to a few hundred people supporting the local fishing industry, and it's also a popular destination for tourists — its Black Sand Beach is one of Alaska's most scenic — and cruise ships.

Not Alaska’s first watery rodeo, but likely the biggest

Image source:

There have been at least two similar events in the state's recent history, though not on such a massive scale. On July 9, 1958, an earthquake nearby caused 40 million cubic yards of rock to suddenly slide 2,000 feet down into Lituya Bay, producing a tsunami whose peak waves reportedly reached 1,720 feet in height. By the time the wall of water reached the mouth of the bay, it was still 75 feet high. At Taan Fjord in 2015, a landslide caused a tsunami that crested at 600 feet. Both of these events thankfully occurred in sparsely populated areas, so few fatalities occurred.

The Barry Arm event will be larger than either of these by far.

"This is an enormous slope — the mass that could fail weighs over a billion tonnes," said geologist Dave Petley, speaking to Earther. "The internal structure of that rock mass, which will determine whether it collapses, is very complex. At the moment we don't know enough about it to be able to forecast its future behavior."

Outside of Alaska, on the west coast of Greenland, a landslide-produced tsunami towered 300 feet high, obliterating a fishing village in its path.

What the letter predicts for Barry Arm Fjord

Moving slowly at first...

Image source:

"The effects would be especially severe near where the landslide enters the water at the head of Barry Arm. Additionally, areas of shallow water, or low-lying land near the shore, would be in danger even further from the source. A minor failure may not produce significant impacts beyond the inner parts of the fiord, while a complete failure could be destructive throughout Barry Arm, Harriman Fiord, and parts of Port Wells. Our initial results show complex impacts further from the landslide than Barry Arm, with over 30 foot waves in some distant bays, including Whittier."

The discovery of the impeding landslide began with an observation by the sister of geologist Hig Higman of Ground Truth, an organization in Seldovia, Alaska. Artist Valisa Higman was vacationing in the area and sent her brother some photos of worrying fractures she noticed in the slope, taken while she was on a boat cruising the fjord.

Higman confirmed his sister's hunch via available satellite imagery and, digging deeper, found that between 2009 and 2015 the slope had moved 600 feet downhill, leaving a prominent scar.

Ohio State's Chunli Dai unearthed a connection between the movement and the receding of the Barry Glacier. Comparison of the Barry Arm slope with other similar areas, combined with computer modeling of the possible resulting tsunamis, led to the publication of the group's letter.

While the full group of signatories from 14 organizations and institutions has only been working on the situation for a month, the implications were immediately clear. The signers include experts from Ohio State University, the University of Southern California, and the Anchorage and Fairbanks campuses of the University of Alaska.

Once informed of the open letter's contents, the Alaska's Department of Natural Resources immediately released a warning that "an increasingly likely landslide could generate a wave with devastating effects on fishermen and recreationalists."

How do you prepare for something like this?

Image source:

The obvious question is what can be done to prepare for the landslide and tsunami? For one thing, there's more to understand about the upcoming event, and the researchers lay out their plan in the letter:

"To inform and refine hazard mitigation efforts, we would like to pursue several lines of investigation: Detect changes in the slope that might forewarn of a landslide, better understand what could trigger a landslide, and refine tsunami model projections. By mapping the landslide and nearby terrain, both above and below sea level, we can more accurately determine the basic physical dimensions of the landslide. This can be paired with GPS and seismic measurements made over time to see how the slope responds to changes in the glacier and to events like rainstorms and earthquakes. Field and satellite data can support near-real time hazard monitoring, while computer models of landslide and tsunami scenarios can help identify specific places that are most at risk."

In the letter, the authors reached out to those living in and visiting the area, asking, "What specific questions are most important to you?" and "What could be done to reduce the danger to people who want to visit or work in Barry Arm?" They also invited locals to let them know about any changes, including even small rock-falls and landslides.

Harvard study finds perfect blend of fruits and vegetables to lower risk of death

Eating veggies is good for you. Now we can stop debating how much we should eat.

Credit: Pixabay
Surprising Science
  • A massive new study confirms that five servings of fruit and veggies a day can lower the risk of death.
  • The maximum benefit is found at two servings of fruit and three of veggies—anything more offers no extra benefit according to the researchers.
  • Not all fruits and veggies are equal. Leafy greens are better for you than starchy corn and potatoes.
Keep reading Show less

Cephalopod aces 'marshmallow test' designed for eager children

The famous cognition test was reworked for cuttlefish. They did better than expected.

The common cuttlefish

Credit: Hans Hillewaert via Wikicommons
Surprising Science
  • Scientists recently ran the Stanford marshmallow experiment on cuttlefish and found they were pretty good at it.
  • The test subjects could wait up to two minutes for a better tasting treat.
  • The study suggests cuttlefish are smarter than you think but isn't the final word on how bright they are.
Keep reading Show less

If we do find alien life, what kind will it be?

Three lines of evidence point to the idea of complex, multicellular alien life being a wild goose chase. But are we clever enough to know?