Gaia Costa raised her hand. And she reached out toward the body of the SUV, almost touching it, as if to say, "Stop ." The 24-year-old's last act was seen by several witnesses and captured on video surveillance cameras.

With a father from Tempio and a mother from Cagliari, Gaia worked as a babysitter on the Costa Smeralda. Yesterday, it was just after 1 p.m. when she was crossing the pedestrian crossing on Via Aga Khan, at the entrance to Porto Cervo . Just then, a BMW SUV started moving . Seeing it, she raised her arm, but the woman behind the wheel—a 40-year-old German tourist in the car with her daughter— accelerated, hitting her .

Gaia was alive when emergency responders arrived, but her injuries were too serious to save her. The woman driving the car hadn't noticed anything; a witness told her she'd hit a young woman. Suddenly, she collapsed to the ground. A moment of inattention proved fatal; the Porto Cervo Carabinieri are checking to see if she was using her phone. Alcohol and drug tests were negative .

Today, the Tempio Pausania Prosecutor's Office will issue the first formal investigation into road homicide. Precautionary measures against the driver appear to be ruled out.

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