From The Truth About Guns:

Everything you need to know about the newspaper’s “investigation” is summed up in the story’s secondary headline: “In recent years, the factory has also pumped billions of rounds of military-grade ammunition into the commercial market, an investigation by The New York Times found, leaving the ‘LC’ signature scattered across crime scenes, including the sites of some of the nation’s most heinous mass shootings.”

In other words, mass shootings aren’t just the fault of the mass shooter. In NYT-world, the ammunition manufacturer somehow bears responsibility as well.