Driver charged with negligent motor vehicle homicide for fatal Milford ambulance crash

MILFORD — The driver who allegedly caused a fatal ambulance crash here Tuesday is now facing criminal charges that include motor vehicle homicide by negligent operation, according to the office of Worcester District Attorney Joseph D. Early Jr.

Lisa Zemack drove her Mercedes-Benz through a stop sign on Green Street and collided with the right rear bumper of an ambulance passing on Route 140, causing it to flip over, according to Milford police.

The crash was captured by the surveillance camera at the Domino’s Pizza shop located at that intersection.

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The Mercedes-Benz “caught the right rear quarter of the ambulance, caused the ambulance to spin 90 degrees clockwise,” Milford Police Sergeant John Sanchioni said in an telephone interview today. “Once it goes 90 degrees, physics and momentum causes it to flip over, a complete flip … It almost went over the guardrail.”

Karen Scott, 58, of Upton, the patient who was riding in the ambulance as she returned to an assisted living facility from a dialysis appointment, was pronounced dead at Milford Regional Hospital on Tuesday, officials said.

A paramedic riding with her was injured, and was treated and released, Sanchioni said.

Zemack’s driver’s license is active, according to Massachusetts Department of Transportation spokesman Michael Verseckes. She has three prior citations, for speeding in 1990, 1995, and 2005.

Zemack is also facing criminal charge of operating to endanger. Milford police have issued Zemack two civil infractions for failure to stop at a stop sign, and failure to grant right of way at an intersection.

Zemack, according to prosecutors, will be summonsed to Milford District Court at a later date.

The video shows the ambulance driving west on Route 140. It has nearly cleared the intersection when the Mercedes appears to run the stop sign on the passenger side of the ambulance and hits the back end of the ambulance, causing the ambulance to flip over. The ambulance comes to rest on the guardrail.