Malcolm Jacob, 20, was found dead in his mother's home on Merriam Avenue.
Charles Williams and Moeleek Harrell gunned down Derek Quattlebaum in Richmond Hill, police said.
Kristal Delvalle declined to testify before a grand jury at a court appearance on Thursday.
Kristal Delvalle, 23, was ordered held without bail on Tuesday night.
A 58-year-old man was found dead in the basement of 430 Lefferts Ave., police sources said.
Kristal Delvalle stabbed Norberto Cruz-Valentin to death in their Concourse Village home, police said.
The homicide took place at 1064 Carroll Pl. in the 44th Precinct.
Michelle Cox, 41, was killed inside her apartment on Webster Avenue near East 179th Street.
Murders and shootings are up 20 percent from last year, police officials said Monday.
Kevin Lopyan was found dead in his basement in Kew Gardens Hills on Feb. 14, police said.
Shemrod Isaac was shot four times and killed in the Lillian Wald Houses, police said.
Shemrod Isaac was shot about 4:30 p.m. Monday and was pronounced dead at the hospital, NYPD says.
Kevin Colon, 20, was shot at around noon on Thursday afternoon, police said.
Jose Antonio Cocuyo-Malaga had been drinking in a bodega when got into a fight outside, police said.
Eric Roman, who was shot in Queens Friday, died the next day.
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