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NBA star Naz Reid 's sister was shot and killed in New Jersey this weekend ... and, cops say her boyfriend's the one who committed the crime.

A woman was shot at an apartment complex in Jackson Township just north of Tom's River, NJ Saturday morning ... and, cops have now identified her as Toraya Reid -- Naz's older sister. Ocean County Jail

Shaquille Green -- a 29-year-old man -- has been arrested and charged with murder, according to Sports Illustrated. SI reports Reid and Green were dating.

According to cops ... officers responded to the complex around 11 AM Saturday morning and found Toraya lying unresponsive, suffering from multiple gunshot wounds. Officers say they found Green running up a street away from the scene.

Nax and Toraya's other sister, Jakahy

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