RUMFORD — Dozens of state and local police officers gathered at Mountain Valley High School on Friday afternoon as the search for a man suspected of killing his wife in Berlin, New Hampshire, focused on the Rumford-Mexico area.

Police are asking the public to be on the lookout for Denis Bisson, 52, who is believed to be driving a silver 2015 Toyota Tundra pickup with the New Hampshire license plate “ALL-GD.” Bisson was described as roughly 5 feet, 6 inches tall and weighing 170 pounds, with brown eyes and brown hair.

Several people reported a number of police vehicles rolling into the school parking lot around 2 p.m., while others said helicopters were flying overhead into the early evening.

Police said the 43-year-old woman’s body was found inside a home Friday morning. The search was on later in the day for Bisson, who is suspected of shooting his wife and is considered armed and dangerous. New Hampshire authorities issued an arrest warrant for Bisson charging him with second-degree murder, according to Stephen McCausland, spokesman for the Maine Department of Public Safety.

Investigators said Bisson was believed to be in the Rumford-Mexico area, although there had been no confirmed sightings of him or the truck he was driving.

One woman who lives near the high school reported at least 40 police vehicles in the parking lot. Among them, she said, was a crisis negotiation van.

McCausland said more than three dozen Maine police officers participated in the manhunt for Bisson, and that a command post was set up on the grounds of the high school in Rumford.

Several people who live in the area said they were staying home and locking their doors until police advised them on the situation.

“There have been no confirmed sights of Bisson or his truck,” McCausland said in a statement Friday night. “Anyone who has seen Bisson, his truck, or has information on his whereabouts is asked to call Maine State Police in Augusta at 207-624-7076.”

Press Herald Staff Writer Kevin Miller contributed to this report.

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