Police officer killed by gunman in Massachusetts

A police procession was held for Officer Michael Chesna, who was killed along with a bystander while attempting to stop the gunman in Weymouth.
1:54 | 07/15/18

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Transcript for Police officer killed by gunman in Massachusetts
siomorrow. Back here at home to the deadly chain of events in a son subur a police officer allegedly led with his own service weapon. The suspect then accused of firing at ndom, Killin woman inside her home. Thfallen officer honored this officers standing in te. Iee reshef H that Stor Repr: Deadly olence orizing thtown of Weymouth, sshusetts. Suing down an officer with his own weapon, leading lice on a dangerous pursuit. Annnocent byander killed in E crossfire. Authoritiey it start around 7:30 A.M. Sunday morning. Fimichael china responding to reports of an erratic driver. That car slamming into another vehie before police say the driver, 20-yold emmanu Lopes, fled on foot. Officer chesna confron him. Lopes then attacked officer chesna, it is believed, with a large stone, striking him in thehead. Epice say lo grabbed the officer's gun, openg fire at T blank nge. Hitting hiltiple Tim in ad and chest. Then, alla sudden, I heard, "Drop your gun."bang, bangbang, bang and th silence. Reporter: A swarm of squad rs arrivinon scene. Police exchanging fire with Lopes. Llow conesow marking the bullet casings. Lopes hit below the knee. There hadhave been, like, 10 or 15 S that wentff. Reporter: But all continuing to fire, shooting into a nearby home. Fatallunnocent woman with tfficer's firearm. Lopes evenly taken dn D arrest this afternoon, a solemn police procession for chesna. The 42-year-waand dedicated father of two. He was just a great family N. He was a great officer. Reporter: Tom, Monday would have beeofficer chna's sixth anniversary on the force. The same day the suspect is du to be arraigned on two counts of murder. Tom? Eelle, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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