We May Not Know If Trump’s Foreign Business Deals Violate the Constitution

Correction, Nov. 28, 2016: This story originally misspelled Lawrence White’s last name. It’s White, not Wright.

U.S. Identifies ISIS Planner in Attacks on Europe

Correction, Nov. 22, 2016: This story originally misstated the age of Abdelilah Himich. He is 27, not 32.

These Professors Make More Than a Thousand Bucks an Hour Peddling Mega-Mergers

Correction, Nov. 16, 2016: The cover illustration of this story previously, and incorrectly, included the logo of Time Warner Cable. AT&T has actually proposed to merge with Time Warner, a different company. We’ve updated the illustration.

Camera Catches Shoving Match with Group Home Worker Before Teenager’s Heart Stopped

Correction, Nov. 2, 2016: This story incorrectly said it was AdvoServ chief executive Michael Martin who showed Carla Thomas a video of her daughter in an AdvoServ group home. It was a different AdvoServ official, State Director Darren Blough.

Unreliable and Unchallenged

Correction, Oct. 28, 2016: This article misstated the minimum bail amount for defendants charged with drug possession. Minimum bail is $3,000, not $5,000. Defendants must have at least $450 available to secure their release from jail, not $500 as the article stated.

How a Tip About Habitat for Humanity Became a Story

Correction, Oct. 27, 2016: This article has been corrected. An earlier version incompletely described how ProPublica obtained key documents and focused its investigation of Habit for Humanity’s New York City affiliate.

A Spike in Rates of Pregnancy-related Deaths in Texas Spurs Soul-searching

Correction, Aug. 24, 2016: This story originally said a study put the U.S. maternal mortality rate at 23.4 percent in 2014. The study said the rate was 23.8 deaths per 100,000 births that year.

Aging But Not Aged Olympians

Correction, Aug. 19, 2016: This post originally gave Duke Kahanamoku’s age as 34 when he won a medal in 1924. He was 33.

On Eve of Olympics, Top Investigator Details Secret Efforts to Undermine Russian Doping Probe

Correction, Aug. 4, 2016: This story was corrected to reflect that Sergey Bubka competed for the Soviet Union and Ukraine, not Russia.

ISIS via WhatsApp: ‘Blow Yourself Up, O Lion’

Correction, July 11, 2016: This story originally characterized a factory in the Forest neighborhood in Brussels as a Renault factory. It’s an Audi factory.

Busted

Correction, July 7, 2016: The July 7, 2016, article, Busted, erroneously included an analysis of cocaine field tests results used by the Las Vegas police department. The sampling did not represent a broad submission of results to the department’s lab — it was an isolated group of field test failures including officer mistakes and false positives — and the data should not have been used to calculate an error rate. ​The article also misstated the​ average number of drug cases analyzed by the police department. The department says it was an average of 1,757 cases per year, not 73. And the article overstated the role field tests play in Las Vegas’s possession arrests. According to the Las Vegas police department, forms of evidence other than field tests can lead to drug possession arrests. They are not based exclusively on field test results.

Education Department Recommends Killing Accreditor of For-profit Colleges

Correction, June 15, 2016: An earlier version of this article listed an incorrect date for when the Department of Education accreditation committee is scheduled to review ACICS. The meeting is scheduled for June 23, not June 24.

The Senate’s Popular Sentencing Reform Bill Would Sort Prisoners By ‘Risk Score’

Correction, June 14, 2016: This story incorrectly said that proposed legislation would make prisoners with high risk scores ineligible for treatment programs. In fact, these prisoners could sign up for treatment programs, though they would still be ineligible to have their sentences reduced until they lowered their risk scores.

How We Analyzed the COMPAS Recidivism Algorithm

Correction, May 23, 2016: This post incorrectly described an independent variable in a model as a dependent variable.

This post also incorrectly described the numerical ratings attached to COMPAS risk scores in two other instances. This did not affect our analyses.

Additionally, this post originally described an accuracy rate as its opposite — a rate of mistakes.

Drought be Dammed

Correction, May 20, 2016: An earlier version of this article misspelled the surname of the Deputy Secretary of the Interior. He is Michael Connor, not Conner.

The NYPD is Running Stings Against Immigrant-Owned Shops, Then Pushing For Warrantless Searches

Correction, April 22, 2016: An earlier version of this story reported that Juana Caballero was arrested in April 2014. She was arrested in April 2013.

Investigation Exposes Failings of Oversight in NYC Group Homes

Correction, April 13, 2016: An earlier version of this article reported that four people had been arrested as a result of the Department of Investigation’s inquiry. DOI has amended its report to say only three people had been arrested.

Amid Public Feuds, A Venerated Medical Journal Finds Itself Under Attack

Correction, April 5, 2016: A previous version of this story incorrectly said that Dr. Jeffrey Drazen was the longest-serving editor of a major medical journal; he is one of the longest.

Everything You’ve Ever Wanted to Know About Voter ID Laws

Correction, July 23, 2012: An earlier version of this story said Texas went to federal court to challenge the DOJ’s denial of preclearance. In fact, Texas filed a lawsuit seeking preclearance from the federal district court two months before the DOJ announced its decision. Also, some states require a government-issued photo that does not have to come from the federal government as first detailed.

Correction, July 23, 2012: An earlier version of this story incorrectly stated “voting law advocates contend these laws disproportionately affect elderly, minority and low-income groups that tend to vote Democratic.” It’s voting law opponents who make that contention.

Correction, July 23, 2012: An earlier version of this story stated that New Hampshire was unsuccessful in enacting a voter ID law. In fact, its legislature overrode the governor’s veto and the law is now in place in the state.

The Referendum That Might Have Headed Off Flint’s Water Crisis

Correction, March 4, 2016: This story originally misspelled the name of state Sen. Gretchen Whitmer.