Florida teen, 19, guns down his father and then executes his mother in front of cops responding to her desperate 911 call

A 'monster' teenager shot down his father and then executed his mother at point-blank range in front of cops before dying in a police shootout.

Police say they received a call just after 11pm on Saturday from a woman - later identified as Rebecca Ann Themelis, 48 - informing them that her husband, Christos Byron Themelis, 51, had been shot. ---More...

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