• Chemical Fingerprint for Explosives in Forensic Research

    The police frequently encounter explosives in their forensic investigations related to criminal and terrorist activities. Chemical analysis of explosives can yield valuable tactical information for police and counterterrorist units.

  • A Fort Hood Serial Killer on the Loose?

    A dozen Texas Senate members are reupping their request for a congressional investigation into the Fort Hood military base after a soldier was found dead earlier this week, becoming at least the ninth person stationed at the Killeen post to have been found dead this year.

  • Rise in Gun Purchases after Mass Shootings Tied to Fear of Firearm Regulations

    Surges in firearm acquisition after mass shootings is a well-documented phenomenon, but analytic research into the causes of this behavior — be it driven by a desire for self-protection, or a fear that access to firearms will be curtailed — is sparse. A new is applying a data science methodology to create a model of the “firearms ecosystem” to identify how decisions to buy guns are affected by individual, social network, and state-level factors.

  • Why Americans Are Buying More Guns Than Ever

    Americans have been on a record gun-buying spree in recent months. Gun sales typically have seasonal cycles, with more guns being sold in winter months, and increase in presidential election years and after high-profile mass shootings. However, the 2020 pandemic spurred a record-setting surge in demand for firearms. Gun sales first spiked in March, when lockdown orders began in the U.S. The figures jumped again in June following nationwide protests over the killing of George Floyd. Our research examines American gun culture and offers insights into the complex relationship between Americans and guns. We believe there are three general reasons why people are purchasing firearms now.

  • Amateur Drone to Aid in Natural Disaster Damage Assessment

    It wasn’t long after Hurricane Laura hit the Gulf Coast Thursday that people began flying drones to record the damage and posting videos on social media. Those videos are a precious resource, say researchers at Carnegie Mellon University, who are working on ways to use them for rapid damage assessment.

  • Vigilantism, Again in the News, Is an American Tradition

    As a scholar of vigilantism in U.S. history and a political scientist interested in how the state and law develop over time, I have found, as have others, that for many Americans, law and order has long been as much a private matter as something for the government to handle. But as Americans focus on the way in which people of color, in particular, have been policed in this country, they should disentangle the damaging forms of vigilantism from a deeper notion that democracy might require ordinary citizens to rely at least partly on themselves to enforce the law. Democracy requires Americans to somehow be vigilant over the use of force in their midst – without themselves becoming vigilantes.

  • Optimal Social Networks of No More Than 150 People

    “It takes a network to defeat a network,” wrote retired Army Gen. Stanley McChrystal, in his book Team of Teams: New Rules of Engagement for a Complex World. U.S. Army researchers agree, and in a new research they argue that new rules of engagement on the battlefield will require a deep understanding of networks and how they operate according to new Army research. Researchers confirmed a theory that find that networks of no more than 150 are optimal for efficient information exchange.

  • Ultrasensitive Measurements Detect Nuclear Explosions

    Imagine being able to detect the faintest of radionuclide signals from hundreds of miles away. Scientists have developed a system which constantly collects and analyzes air samples for signals that would indicate a nuclear explosion, perhaps conducted secretly underground. The system can detect just a small number of atoms from nuclear activity anywhere on the planet. In terms of sensitivity, the capability – in place for decades – is analogous to the ability to detect coronavirus from a single cough anywhere on Earth.

  • Gunshot Injuries in California Drop, but Percentage of Firearm Death Goes Up

    Gun-violence research experts say that despite a significant drop in firearm injuries in recent years in California, there has been a substantial increase in the state’s overall death rate among those wounded by firearms. “We found that the number of nonfatal firearm injuries in California decreased over an 11-year period, primarily due to a drop in firearm assaults,” said Sarabeth Spitzer, lead author and a UC Davis research intern at the time of the study. “However, the lethality of those and other firearm injuries did not go down. In fact, it went up.”

  • Next-Generation Explosives Trace Detection Technology

    Explosive materials pose a threat whether they are used by domestic bad actors or in a theater of war. Staying ahead of our adversaries is a job that DHS DOD share. The two departments’ research and development work is no different.

  • Handgun Purchaser Licensing Laws Associated with Lower Firearm Homicides, Suicides

    State handgun purchaser licensing laws—which go beyond federal background checks by requiring a prospective buyer to apply for a license or permit from state or local law enforcement—appear to be highly effective at reducing firearm homicide and suicide rates, according to a new analysis of gun laws.

  • Police solve just 2% of all major crimes

    As Americans across the nation protest police violence, people have begun to call for cuts or changes in public spending on police. But neither these nor other proposed reforms address a key problem with solving crimes. My recent review of fifty years of national crime data confirms that, as police report, they don’t solve most serious crimes in America. In reality, about 11 percent of all serious crimes result in an arrest, and about 2 percent end in a conviction. Therefore, the number of people police hold accountable for crimes – what I call the “criminal accountability” rate – is very low.

  • QAnon Conspiracies on Facebook Could Prompt Real-World Violence

    As Facebook continues to grapple with hate speech and violent extremism across the platform, QAnon conspiracy theorists are using public and private Facebook pages and groups to spread disinformation, racism, and thinly veiled incitement to violence. This conspiracy is estimated to have a Facebook audience of millions of users.

  • New Detection Method to Protect Army Networks

    U.S. Army researchers developed a novel algorithm to protect networks by allowing for the detection of adversarial actions that can be missed by current analytical methods. The main idea of this research is to build a higher-order network to look for subtle changes in a stream of data that could point to suspicious activity.

  • One Step Closer to Bomb-Sniffing Cyborg Locusts

    Researchers found that they could direct locust swarms toward areas where suspected explosives are located, and that the locusts’ brain reaction to the smell of explosives can be read remotely. Moreover, a study found locusts can quickly discriminate between different smells or different explosives. “This is not that different from in the old days, when coal miners used canaries,” says a researcher. “People use pigs for finding truffles. It’s a similar approach — using a biological organism — this is just a bit more sophisticated.”