DEDHAM, MASS. (WHDH) - The trial for a man accused of killing Weymouth police Sgt. Michael Chesna and a woman who was sitting on her porch during a violent confrontation in 2018 is set to begin on Thursday now that a jury has been seated.

Emanuel Lopes, 25, has been ordered held without bail since his indictment. Prosecutors say he was fleeing a traffic stop when he hit Chesna with a rock and then murdered him with his own service weapon. Vera Adams, 77, was fatally struck by a bullet while Lopes was shooting at another officer, prosecutors allege.

Chesna, 42, a U.S. Army veteran, left behind a wife and two children.

The trial is taking place in Dedham Superior Court. Lopes is facing two counts of murder.

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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