This bill creates an Active Shooter Alert Coordinator position within the Department of Homeland Security to improve how alerts about active shooters are distributed to the public. The coordinator will work to eliminate gaps in the alert system, particularly for shooters who cross state lines, and will encourage states and local governments to develop active shooter plans and apply for federal grants to improve their alert capabilities. The bill also requires the federal government to report annually on how many alerts are being sent, how many local law enforcement agencies are participating in the system, and efforts to improve the geographic accuracy of alerts. The legislation affects state and local law enforcement agencies, emergency management officials, and ultimately the general public who receive these critical safety alerts. No specific funding amounts or implementation timelines are specified in the bill.