VIDEO: Man accused of threatening to 'shoot up school' in San Mateo attempts to buy gun at Big 5

SAN MATEO, Calif. (KGO) -- Police released surveillance video of a man who allegedly threatened "to shoot up a school" in San Mateo while he was attempting to buy a gun at a Big 5 Sporting Goods Store on South El Camino. Watch the video player above for a look at the newly released video.

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