@foxnews: A Louisiana substitute teacher is accused of triggering false active shooter alerts at five schools, sending officials scrambling to protect students and staff while they worked to determine whether the threats were real. Investigators determined the alerts were false and arrested Lytonja Barfield on five counts of menacing. The district says she is no longer employed and was not assigned to any school at the time. Authorities have not disclosed a possible motive and the investigation remains ongoing.