Admits vicious knife slay of ex

A QUEENS man pleaded guilty Tuesday to stabbing his ex-wife to death inside their flushing home.

Naser Alzein, 55, admitted to knifing Josephine Mendoza, 68, in the face and neck when she asked him to leave the house in November 2014.

Alzein called police after the crime, but when officers showed up at the Northern Blvd. home, he had his bags packed to leave, according to a law enforcement source.

He pleaded guilty to first-degree manslaughter charges in exchange for 24 years in prison and will be sentenced in April.