Brookfield police have now identified both parties to a murder-suicide that occurred April 15 behind a duplex at 540-542 Syme St.

The deceased are Diana M. Rice, 34, of 542 Syme, and Kyle D. Nicholson, 34, of the same address. The public release of their names had been delayed by the difficulty in finding Nicholson’s relatives, police said.

Police said they believe Nicholson shot Rice and then shot himself.

Nicholson died at St. Elizabeth’s in Youngstown, and the Mahoning County Coroner’s Office has ruled his death a suicide, Police Chief Dan Faustino said. Rice died at Sharon Regional Medical Center, and the chief said he has not heard from the Mercer County coroner on the status of his investigation into her death.

Rice was in a car outside the garage at 542 Syme, and her 13-year-old son was in the car with her, police said. Nicholson was outside the car, and Rice’s 10-year-old son was in front of the car, police said. Video shot by a neighbor showed that Rice and Nicholson were arguing, police said.

“We’re not sure what they were arguing about,” Faustino said.

Nicholson made the initial call to 911, reporting an argument that did not include physical violence. He told dispatchers that he lived at 542 Syme, and had been there for about four months, Faustino said.

The call went to Mercer County 911, a common occurrence on the border between Trumbull and Mercer counties, at 2:22 p.m., and was transferred to Trumbull 911, which dispatched emergency responders at 2:25 p.m.

promoPolice arrived at 2:33 p.m.

“Officers arrived to find both of them down,” Faustino said.

Rice had lived in Brookfield for some time prior to moving to 542 Syme, police said.