Police investigate Mercer Island murder-suicide, Issaquah double murder

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Police investigating potential murder-suicide on Mercer Island

Mercer Island police are investigating after two people were found dead inside of a home, calling it a potential murder-suicide.

Police are investigating after a mother and son were killed in a possible murder-suicide on Mercer Island, and two others were found dead in an Issaquah home on Tuesday.

According to the Mercer Island Police Department (MIPD), at around 10:45 a.m., officers responded to a residence near the corner of Southeast 46th Street and 84th Avenue Southeast for a welfare check. 

When officers arrived, they looked through a window from outside the home and saw a body lying on the ground. 

After making entry into the home, officers found two bodies with gunshot wounds, a woman in her 70s and a man in his 40s. Authorities said they are believed to be a mother and son. A gun was recovered at the scene.

Police do not believe anyone else was living at the home at the time of the incident.

Dig deeper:

About an hour later, the Issaquah Police Department was requested by Mercer Island Police to do a welfare check at a home along Southeast Evans Lane.

There, officers discovered two more bodies: a woman in her mid-40s and a man in his mid-30s. Police said there was no sign of forced entry.

Mercer Island PD said they requested the welfare check for an individual who used to reside at the home where the murder-suicide happened.

What they're saying:

Police said they do not believe there are any other suspects, and there is no indication of an ongoing threat to the community.

"We don't think there's an outstanding suspect," said MIPD Commander Jeff Magnan. "At this point, we are still investigating. We've got our detectives here, and we are going to have assistance from Washington State Patrol – their crime people are going to come in and process our scene for us. And we are currently working with the King County Prosecutor's Office for any warrants we might need to evaluate and to look for additional evidence or any sort of motive."

What's next:

Detectives are now working to obtain warrants to search surveillance video from the homes. They are also looking for any relatives to make proper notification. 

"This time of year, unfortunately, domestic violence tends to go up – I'm not sure if that's what this case is," said Magnan. "We're still investigating that, but we do see a rise in domestic incidents that occur during the holiday times."

The King County Medical Examiner’s Office will determine the official cause and manner of death of the four individuals.

The Source: Information in this story comes from the Mercer Island Police Department.

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