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SR man waives hearing related to involuntary manslaughter charges

EVANS CITY — A Slippery Rock man charged with involuntary manslaughter in connection to a fatal August 2022 collision involving two garbage trucks in Adams Township waived his preliminary hearing Wednesday, April 17.

Mark E. Seybert, 51, is accused of blocking both lanes of traffic near 441 Mars Valencia Road while driving a Vogel Disposal Service garbage truck, causing a crash with a Waste Management garbage truck.

The crash resulted in the death of David Bortmes, 53, who was driving the Waste Management truck.

Seybert waived his hearing before District Judge Amy Marcinkiewicz.

Adams Township police said Seybert was attempting to make a 180-degree left turn onto the road when the Waste Management garbage truck driven by Bortmes struck the back end of the Seybert’s vehicle and crashed into a nearby vacant building during the early morning incident Aug. 26, police said.

The affidavit said Seybert’s actions showed “gross negligence,” as there were other options to make the turn safely.

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