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Mass shooters exploited gun laws, loopholes before carnage

The latest suspected U.S. mass shooters whose ability to obtain guns has raised concerns. In some cases shooters got guns legally under current firearms laws, or because of background check lapses or law enforcement's failure to heed warnings of concerning behavior.

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EL PASO, TEXAS, AUG. 3, 2019. 23 DEAD Patrick Crusius bought an AK-47-style rifle and 1,000 rounds of hollow-point ammunition online 45 days before he walked into a Walmart store and opened fire, killing 23 people and injuring two dozen others, before confessing that he had been targeting Mexicans, according to prosecutors. A Crusius family lawyer said his mother raised concerns about the purchase in a call to police on June 27. Police said she asked if Crusius, who was 21 at the time, was old enough to buy a gun.