Lethal injection is the primary method of execution in the United States. But as the morality and fairness of the death penalty continues to face scrutiny and the drugs used for the cocktail are running out, it may be nearing a turning point. Here's a round-up of the best reporting on the practice.

This Is The Man in India Who is Selling States Illegally Imported Execution DrugsBuzzfeed, October 2015
When Nebraska ran out of execution drugs, they turned to Chris Harris – a man in India with no pharmaceutical background who sold them tens of thousands of dollars' worth. Owing to government regulations, however, the drugs never made it past the airport.

A Brief History of American ExecutionsThe Atlantic, June 2015
This piece gives a broad overview of the grisly history of executions in the US, from hangings to lethal injections.

The Executioner's LamentNPR, May 2014
Jay Chapman "invented" the modern lethal injection when he served as the state medical examiner in Oklahoma after lawmakers sought a more humane way to execute people. Oklahoma is one of the primary US states where the fight to dismantle the current system is being waged.

Critics Say Execution Drug May Hide SufferingThe New York Times, October 2003
The second drug commonly used in "Chapman's Protocol" before states began running out was pancuronium bromide, a muscle relaxer that one judge wrote, "gives a false impression of serenity to viewers, making punishment by death more palatable and acceptable to society."

The Execution of Joseph Wood60 Minutes, November 2015
In July 2014, Joseph Wood was executed in Arizona. His execution was supposed to take about 10 minutes. He eventually died after 14 additional doses of the execution drug, one hour and 58 minutes after the execution began. Why? This look by 60 Minutes examines the circumstances surrounding Wood's execution and the place it continues to have in the national discussion on lethal injection.

After Lethal InjectionThe Marshall Project, June 2015
While the war to preserve lethal injection was still being waged in the US Supreme Court, this piece examined the ways states were readying alternatives to injection. Oklahoma considered nitrogen gas, Utah looked at using firing squads, and Tennessee opted for its electric chair.

States Lawyer Up, Looking To Find A Way To Buy Execution Drugs From OverseasBuzzfeed, October 2015
Nebraska is not the only state buying execution drugs from Chris Harris. Arizona and Texas purchased drugs from the dealer in India that were held up by the US food and drug administration. The states are among several, including Ohio, trying to find a way around laws and regulations to get execution drugs.

This article first appeared on ProPublica.