A Brooklyn grand jury Tuesday upgraded the charges against a man who police said killed a young Hasidic family earlier this month in a horrific car crash in Williamsburg.

Julio Acevedo, 44, faces a possible life term in prison with new charges of second-degree manslaughter and criminally negligent homicide. He was indicted on March 12 on charges of leaving the scene of an accident after the BMW he was driving plowed into a livery cab that was taking Nathan Glauber and his pregnant wife, Raizy, both 21, to a hospital.

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The March 3 crash, in which police believe Acevedo's car was going over 69 mph, killed the Glaubers and led to the death a day later of the couple's son, who was delivered prematurely after the accident. The driver of the cab suffered only minor injuries.

Acevedo, of Brooklyn, fled to Pennsylvania after the accident but turned himself in when a friend helped arrange it.