Por Holmes Lybrand, Evan Pérez y John Miller, CNN

Cinco días después de que comenzara una extensa búsqueda, la policía se acercó al sospechoso del tiroteo en la Universidad de Brown tras surgir aparentes vínculos entre el ataque del sábado en la escuela de Providence, Rhode Island, y la muerte dos días más tarde de un profesor del MIT en su casa de Massachusetts.

Cuando los investigadores comenzaron a indagar sobre el tiroteo del lunes en la casa del profesor, el FBI declaró inicialmente que no existía ninguna conexión conocida entre ese crimen y el incidente masivo en la institución de la Ivy League, a unos 80 kilómetros de distancia.

Sin embargo, un coche de alquiler podría haber proporcionado a los investigadores una posible conexión, un avance que condujo a un registro en un almacén de New Hampshire, donde las autoridades informaron que el jueves por la noche encontraron muerto al sospechoso.

“Esta noche, nuestros vecinos de Providence por fin pueden respirar con más tranquilidad”, declaró el alcalde Brett Smiley, en una conferencia de prensa el jueves por la noche.

Allí, las autoridades identificaron al sospechoso como Claudio Neves Valente, de 48 años, exalumno de la Universidad de Brown y ciudadano portugués sin antecedentes penales en Estados Unidos.

Los investigadores creen que actuó solo, declaró el jefe de policía de Providence, coronel Oscar L. Pérez Jr.

Nuno Loureiro, el profesor del MIT que murió a tiros en su casa en Brookline, Massachusetts, también era ciudadano portugués, y el agente especial del FBI, Ted Docks, declaró el jueves por la noche que las autoridades creen que los dos hombres asistieron a la escuela en Lisboa al mismo tiempo.

En una conferencia de prensa separada el jueves, la fiscal federal para el distrito de Massachusetts, Leah Foley, manifestó que Neves Valente y Loureiro asistieron al mismo programa académico en Portugal entre 1995 y 2000.

De hecho, los registros escolares muestran que el sospechoso asistió al Instituto Superior Técnico en Lisboa, Portugal, en la década de 1990, al mismo tiempo que Loureiro.

Los investigadores creen que el sospechoso tenía como objetivo específico a Loureiro, según declaró un agente del orden a CNN.

Sin embargo, actualmente no creen que las dos personas que murieron en el tiroteo en Brown, donde el sospechoso estudiaba a principios de la década de 2000, fueran objetivos directos.

La policía afirmó que aún trabaja para determinar el motivo del tiroteo en la universidad, que se produjo mientras los alumnos estudiaban para sus exámenes finales.

Documentos judiciales publicados el jueves revelaron avistamientos aparentemente inquietantes del sospechoso en el edificio Barus & Holley, donde ocurrió el tiroteo, en múltiples ocasiones durante las semanas previas al ataque.

Un conserje del campus notó a una persona —que llevaba una mascarilla quirúrgica y cuya vestimenta coincidía con la del individuo que aparece en el video de vigilancia publicado por la policía— al menos dos veces desde el 28 de noviembre, según la declaración jurada.

Los avistamientos ocurrieron entre las 3:00 p.m. y el atardecer, según los investigadores.

De acuerdo con otra fuente policial, los investigadores hablaron con un miembro del personal de mantenimiento de la Universidad de Brown, quien vio a una persona sospechosa dentro del edificio Barus & Holley después de horas la noche anterior al tiroteo.

El trabajador de manten

fizkes // Shutterstock

For finance teams at large companies, managing expenses involves more than approving reimbursements. Expense management includes controlling costs, ensuring compliance, and maintaining financial visibility at scale across teams and spending categories. Travel and entertainment alone represents the second-largest indirect expense for most companies after payroll, according to Mastercard, making expense management a critical business function.

Enterprises face challenges that make traditional expense processes inadequate. Growing expense volumes, decentralized spending driven by distributed teams, and increasing scrutiny over costs require updated approaches. As a result, modernizing expense management automation should be a strategic priority rather than an operational afterthought.

This article from Brex covers the importance of enterprise expense management, common challenges, proven best practices, essential tools, and emerging trends. You’ll learn how to improve your expense management processes, implement expense policies, and use technology to transform expense management from a reactive task into a proactive tool for better financial performance.

What is enterprise expense management?

Enterprise expense management refers to the policies and processes organizations use to control, track, and optimize spending related to employee and operational expenses. This includes travel and entertainment, employee reimbursements, business credit card transactions, departmental discretionary purchases, and incidental spending tied to business operations.

Unlike small and medium-sized businesses, large enterprises manage complex expense processes across multiple regions, currencies, teams, and regulatory requirements. On top of that, these organizations typically handle decentralized spending, high transaction volumes, and stricter audit requirements, making real-time oversight necessary for financial control.

The top benefits of expense management for enterprises

Strategic expense management helps establish your financial health. When implemented properly, it protects profit margins, reduces operational inefficiencies, and creates the visibility finance teams need to make strategic decisions.

Better profit margins and cash flow

Unmanaged or poorly managed expenses directly impact profit margins and strain cash flow. When these costs lack proper oversight, organizations can exceed budgets that impact their bottom line.

Controlling expense costs helps protect your business’s profitability as each dollar saved through better expense management improves profits. Companies with strong expense controls can redirect savings toward growth initiatives, technology investments, or competitive advantages that drive long-term value.

Cash flow also improves when expenses

Sodel Vladyslav // Shutterstock

Virtually every scientific field has made strides by harnessing light to study the properties of substances. This technique, called spectroscopy, has countless research applications, and innovations in spectroscopic technologies are allowing it to make more accurate, efficient and diverse contributions today than ever.

Ocean Optics explores how spectroscopy works, its variations and its applications in the lab and beyond. Discover how spectroscopic innovations will continue to revolutionize modern research.

What Is Spectroscopy?

Spectroscopy is a method for analyzing the interaction between matter and electromagnetic radiation, including light. It helps scientists understand materials by measuring the wavelengths of light that a substance absorbs, emits or scatters. Each material’s molecular structure and composition produce a unique spectral pattern, called a spectrum, when exposed to electromagnetic radiation, so spectroscopy can help identify and quantify materials with precision.

How Does Spectroscopy Work?

Spectroscopy works by exposing atoms and molecules in a sample to light or other forms of electromagnetic radiation across a range of wavelengths. These wavelengths typically include the ultraviolet (UV), visible and infrared (IR) regions of the electromagnetic spectrum, though gamma rays and radio waves have some applications, too. Each region interacts with matter differently, allowing for targeted testing of specific properties or components within a sample.

The sample’s particles may absorb, emit, transmit, reflect or scatter the radiation energy. Each material interacts with light in a unique pattern of absorbance, emission, transmittance, reflectance and scattering because of its molecular structure, including the arrangement of its electrons and the types of chemical bonds it has. This allows scientists to measure the intensity of light at each wavelength before and after it interacts with the sample.

Detectors are the components within spectroscopy systems that sense and measure the intensity of light after it interacts with the sample and is separated into wavelengths by the spectrometer. The detector also helps convert light signals into electrical signals that scientists can analyze and record. Common types of detectors include photomultiplier tubes (PMTs), charge-coupled devices (CCDs) and photodiodes.

Scientists can visualize the data from their spectroscopic measurements as a spectrum of peaks and valleys, which is like a molecular fingerprint. By studying a sample’s spectrum, we can draw conclusions about its

fizkes // Shutterstock

When the mail arrives carrying a letter from a car insurance provider, the natural inclination is often to toss it into the “later” pile. However, if that envelope contains a notice of nonrenewal, ignoring it can lead to a costly, stress-filled scramble. Nonrenewal is the decision by a car insurance company to end a policy at the expiration date, and it’s a critical time bomb with a fuse length determined entirely by state law.

The difference between a nonrenewal notice arriving with 60 days to spare and one arriving with only 30 days is significant. That window is the only time a policyholder has to shop, compare, and secure new auto insurance without having a lapse in coverage, a lapse that can instantly disqualify one from the best rates and compromise efforts to find affordable car insurance. In this article, Cheap Insurance explores the legal foundations protecting consumers and reveals the varying deadlines that insurers must abide by across the country.

The Crucial Distinction: Cancellation Versus Nonrenewal

Understanding the rights of the policyholder begins with recognizing the fundamental difference between two key terms in the insurance lexicon: cancellation and nonrenewal.

• Cancellation: This refers to the termination of the policy before its official end date. Once a policy has been in force for 60 days, most states severely restrict the reasons an insurer can cancel it. California, for example, limits midterm cancellation strictly to nonpayment of premium, fraudulent misrepresentation, or a substantial increase in risk. New Jersey similarly restricts cancellation to nonpayment or a suspended license after the initial 60 days. The notice period for cancellation is typically short, often just 10 to 20 days.
• Nonrenewal: This is when the vehicle insurance provider chooses not to offer a new policy term once the current one officially expires. Nonrenewal is based on the insurer’s underwriting decision or a business strategy change. The notice periods for nonrenewal are generally much longer than those for cancellation, giving the policyholder adequate time to secure new coverage.

The nonrenewal process is a regulated safeguard. It prevents an auto insurance company from abruptly dropping coverage, which could leave a motorist stranded without the legally required financial responsibility. State laws often impose additional limits on nonrenewal itself; New York has a notable “2% Rule” limiting the annual nonrenewal rate per territory. In Illinois, a nonrenewal notice is required at least 60 days in advance and must clearly explain the insurer’s decision. The time window for this notice is the primary consumer protection mechan

MEDIAIMAG // Shutterstock

The holidays can be hard on your wallet, even if you’re in a strong financial position. But they can be especially challenging for people in debt — and if that’s you, you’re not alone.

Outstanding credit card debt balances, which are known for coming with particularly high interest rates, jumped to $1.23 trillion in the third quarter of this year, according to data from the Federal Reserve Bank of New York. Understandably, financial stress from being in debt can compound during the holidays when there are gifts, decorations and flights to buy: 69% of respondents to a survey of 2,000 Americans published by Talker Research and Current, a consumer fintech banking platform, said the holiday season is the most financially stressful part of the year.

But financial experts say there are several changes you can make to your plans this season to handle the holidays when you’re in debt.

How to handle the holidays when you’re in debt

From adjusting your gifting strategy to finding free events, here are five ways to alleviate the stress of spending in December when you’re in debt.

1. Review your debt repayment strategy
The first step to ready yourself for holiday spending is to revisit your debt repayment goals and strategy, says Chloé Moore, a certified financial planner and founder of Financial Staples in Atlanta. By doing this, you can have a clear understanding of how much wiggle room you have for your spending.

If you typically pay $250 towards a debt payment per month, subtract that, your housing costs, the typical amount you pay for everyday essentials like gas and groceries, and any other necessary payments from your total income for December. The figure you have leftover can be used to determine how much you can spend for the rest of the month.

Having a set amount of money that you can spend in mind also “gives you the freedom to say ‘no’ or ‘I can’t afford this’” when friends and family invite you to activities that will eat away at your budget, Moore says. That brings us to the next step.

2. Be honest
When loved ones invite you to participate in costly activities like shopping at a holiday market or seeing a show, it can be difficult to say no. But being honest with your friends and family, and letting them know you are prioritizing debt repayment can help, says Spencer Betts, a certified financial planner and financial consultant with Bickling Financial Services in Lexington, Massachusetts. Setting expectations up-front helps avoid disappointment.

“Talk openly about your goals with family and friends. Much of the stress comes from hiding financial strugg