NEW BRUNSWICK, NJ - A 31-year-old Essex County man has been charged with first-degree aggravated manslaughter and second-degree vehicular homicide after he allegedly struck and killed a man riding a motorcycle in Edison on Saturday.

Roland Q. Lyles, 31, of Orange was arrested and charged on June 27 with aggravated assault in the second degree. The charges were upgraded today, following the death of the victim.

Lyles was driving a white Nissan Sentra on Route 1 North near Grandview Avenue at about 2:19 a..m. when he struck and killed Richard Diaz, 51, of Brooklyn, according to a press release from Middlesex County Prosecutor Yolanda Ciccone and Chief Thomas Bryan of the Edison Police Department.

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Diaz, who was riding a motorcycle, was taken to Robert Wood Johnson University Hospital in New Brunswick following the crash. He died Tuesday from his injuries.

Lyles was charged on June 27 with aggravated assault.

Police said the charges were upgraded today following Diaz's death.

Diaz has also been charged with driving with causing the death of another person in the third degree. Police said he was issued summonses for driving while intoxicated and driving with a suspended license.

The investigation is active and is continuing. Anyone withinformation is asked to call Detective Dominick Masi of the Edison PoliceDepartment at (732) 248-7400, or Detective Jonathan Berman of the Middlesex County Prosecutor’s Office at (732) 745-4328.