Nicholas Diaz, 81, killed Kevin Rivera during a domestic dispute in Bushwick, police said.
Police arrested Michael Crocker, who allegedly killed his girlfriend's son Tuesday.
Randy McNair, 22, was charged with the murder of Melvin McLoyd at 58 West 117th St. Wednesday morning.
A 26-year-old man was stabbed early Wednesday near 117th Street and Park Avenue.
Malcolm Jacob, 20, was found dead in his mother's home on Merriam Avenue.
The victim stepped out of a pharmacy in Inwood and was slashed across his chest, police said.
The incident occurred a little before 3 p.m. on Jan. 30, officials said.
The man was found unconscious outside 213 W. 40th St. in Midtown, police said.
Two men sexually assaulted a woman and stabbed her boyfriend in a Brownsville home, police said.
Durrell Finley, 26, was stabbed and killed after he asked another man for some beer, police say.
Levi Rosenblatt, 22, was attacked at the headquarters of the Chabad-Lubavitch community last week.
Ken Goodwin murdered Justin Fallu and stabbed three other teenage boys in Pelham Parkway, police said.
The victims of the stabbing are not cooperating with police who are investigating the assault.
Christian Morales was charged with stabbing Carlos Santos in the head on Liberty Avenue in June.
An 18-year-old was repeatedly stabbed in the Elder Avenue subway station Thursday, police said.
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