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A Pennsylvania mom sentenced to life in prison for brutally murdering her two young sons also tried to shoot their 19-year-old cousin — but the gun miraculously jammed and he was able to disarm her, according to harrowing security footage shown by prosecutors this week.

Trinh Nguyen, 40, was sentenced on Wednesday to two consecutive life terms for killing her sons in May 2022 and received an additional 10 to 20 years for the attempted murder of her ex-husband’s nephew, who was also a neighbor.

Moments after shooting 9-year-old Nelson Tini and 13-year-old Jeffrey Tini in their beds as they slept, the deranged mother pulled a gun on Gianni Melchiondo outside of her home in the upscale Upper Makefield Township in eastern Pennsylvania.

Nguyen attempted to shoot but the gun never fired, giving Melchiondo a chance to disarm her, prosecutors said.

Video from the Bucks County District Attorney’s Office shared on the Bucks County Courier Times’ website shows Nguyen hand a box to Melchiondo — reportedly photos for him to give to her ex-husband — before drawing the gun.