MARSHFIELD, MASS. (WHDH) - Authorities are continuing their search for an “armed and dangerous” Rockland man accused of shooting and killing his estranged wife in Marshfield Monday evening.

Allen Warner, 47, who is a person of interest in connection with the homicide, is believed to have fled the area in a gray 2013 Toyota Corolla with Massachusetts registration of 4FSZ80, according to Plymouth District Attorney Timothy J. Cruz.

Cruz urged Warner to turn himself in during a press conference Tuesday, saying, “Turn yourself in so that no one else is hurt today. No one wants to see anybody else hurt and we want this to come to a peaceful resolution.”

Marshfield police issued an active shooter alert Monday after Warner allegedly chased his estranged wife, 48-year-old Shana Warner, in his car before pulling a gun and fatally shooting her on Main Street around 6 p.m.

Her gray SUV ended up in the grass along the side of the road but Warner took off, the DA’s office said.

Paramedics transported Shana Warner to South Shore Hospital after she dialed 911, Cruz said. She was later pronounced dead just before 6:45 p.m.

Police immediately began a massive manhunt and ordered residents to shelter in place.

Concerns about an active shooter in town spread to the high school, where officers from Marshfield and Hanover were on site making sure kids were safe.

“One of the local police officers came out and told the coach that they had an active shooter out on Forest Street and basically get the kids into the school and on lockdown,” Steve Leonard, a concerned father of two football players, recalled.

Local and state police used armored vehicles and K-9 units to search a large area around Main Street but could not find Warner.

After a few hours, police allowed students to leave the school while being escorted and told the community to remain on alert.

Marshfield Police Chief Phil Tavares thanked the town for their cooperation during the manhunt, adding that it’s important to track down Warner.

“It’s only a matter of time before he’s discovered,” Tavares said. “This is just another example of a despicable, cowardly act of domestic violence. It won’t be tolerated.”

Tavares added that Warner is known to other police departments but has only had one interaction with Marshfield officers.

This incident happened about five days ago when officers responded to a suspicious man on School Street, later determined as Warner, wearing a camouflage rain jacket, Tavares said. He allegedly stated he was out collecting cans.

No criminal activity was recorded at that time, Tavares added.

Anyone who sees Warner or his 2013 Toyota Corolla is asked not to approach him and immediately call 911.

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