Mass Casualty, Active Shooter Matt Helmkamp Mass Casualty, Active Shooter Matt Helmkamp

Update: First-Degree Murder Charges Filed in Arcadia Lake Oklahoma Mass Shooting; 80-Plus Rounds Fired, 24 Wounded Including Six Juveniles

Oklahoma County prosecutors filed first-degree murder charges June 5 against two men for the May 3 Arcadia Lake mass shooting in which at least 80 rounds were fired, killing Avianna Smith-Gray and wounding 24 others including six juveniles, with a gang-related offense count in the charging documents.

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