Police found 'ghost gun' kits in his truck. He learned how to assemble them on YouTube.

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Dec 09, 2021 Police found 'ghost gun' kits in his truck. He learned how to assemble them on YouTube. More than three years after YouTube tightened its gun content restrictions, an NBC News review found dozens of videos, with more than 4.6 million combined views, showing how to assemble untraceable "ghost guns."  The proliferation of homemade weapons videos is a vexing problem for law enforcement officials across the country, who have linked them to mass shootings, attacks on police and drug and gang killings in recent years. Read More Follow Us Get the NBC News Mobile App Check out all NBC News newsletters here. 30 Rockefeller Plaza New York, NY 10112 View in browser | Unsubscribe | Contact | Privacy