The alleged serial carjacker whose wild Queens crime spree led to the friendly-fire shooting of an NYPD officer was thrown behind bars without bail Sunday — as shocking new details of his short-lived rampage emerged.

Kevin Dubuisson, 28, is now accused of leaving an 87-year-old woman with brain injuries during his Friday morning fracas in which he attempted to violently steal two cars, threatened to “kill” another victim and left the police officer with gunshot wounds and a broken leg, according to new court documents.

The elderly woman was being helped from her car by her daughter — and both were knocked to the ground when Dubuisson allegedly backed into them “at high speed” with an SUV he’d just stolen. 4

She suffered a fractured wrist, a cut on her head, blood loss and a brain b

See Full Page