Keith Belajonas, 32, logged into Facebook after brutally attacking and killing his 28-year-old wife Christina at home.
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He wrote chillingly: “Had an argument. She was cheating on me. I won.”
Belajonas, armed with two guns, then fled his home with his two young sons, 4-year-old Christopher and 5-year-old Robert.
A neighbour who spotted the man leaving with the children, heard one of the boys ask:
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"Is mummy dead?"
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Belajonas, after a 100-mile ride, dropped the two boys off with his younger brother, before attempting to escape the police.
After a brief chase he was cornered in a dead-end street.
Police said he shot himself before he could be apprehended.
His car was littered with empty beer cans and officers recovered several knives, according to the New York Daily News.
Not original Facebook post above.