A Pennsylvania man arguing with his girlfriend outside a 7-Eleven convenience store while allegedly wielding a screwdriver shot and killed a woman who tried to intervene with a gun — taking it away from her and opening fire, cops say.

Surveillance video obtained by The Philadelphia Inquirer and local ABC affiliate WPVI shows John Kelly, 45, allegedly gunning down Lauren Jardine with her own firearm, which she was illegally carrying, during a fight over the weapon, according to prosecutors.

Philadelphia Assistant District Attorney Jeff Hojnowski told local media outlets that Jardine, 33, was simply walking by when she saw Kelly holding a screwdriver and arguing with his girlfriend outside a 7-Eleven at 12th and Chestnut Streets in Center City on Friday at around 5:45 p.m.

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