The mother of a 6-year-old Virginia boy who shot and wounded his teacher in Virginia has pleaded guilty to a federal charge of using marijuana while possessing a firearm. It’s a crime under federal law that’s facing increasing scrutiny as more states legalize the drug. Deja Taylor is accused of lying about her marijuana use on a form when she bought the gun, which her son later used to shoot Abby Zwerner in her classroom in Newport News. The first-grade teacher was seriously wounded and has endured multiple surgeries. Taylor’s attorneys agreed to a negotiated plea agreement with prosecutors that calls for a sentence of 18 months to 24 months in prison. Sentencing is scheduled for Oct. 18.