A Mundelein police squad car parked outside a home with crime scene tape at nightA Mundelein police squad car sits outside a home taped off with crime scene tape in the 200 block of Wellington Avenue in Mundelein early Monday morning after five adults were found shot to death inside late Sunday night in what police say was an apparent murder-suicide. | Photo: Captured News

The coroner has identified an elderly couple, their son, their grandson and the son’s longtime partner as the five killed in an apparent murder-suicide inside the couple’s Mundelein home Sunday evening.

Lake County Coroner Jennifer Banek identified the deceased on Tuesday as James Schmidt, 80, and Rebecca Schmidt, 77, both of Mundelein; their son, Bryan Schmidt, 51, recently of Antioch and formerly of Lake Bluff; their grandson, Maclaine Schmidt, 22, of Lake Bluff; and Nicole Heiser, 37, recently of Antioch and formerly of Lake Bluff.

A Mundelein police officer walks past crime scene tape and traffic cones toward a red ranch homeA Mundelein police officer walks past crime scene tape toward a home in the 200 block of Wellington Avenue in Mundelein Monday morning after five adults were found shot to death inside late Sunday night. | Photo: Nick Rusin

Maclaine Schmidt was Bryan Schmidt’s son and Heiser was in a long-term relationship with Bryan Schmidt, Banek said.

Autopsies performed Monday showed James and Rebecca Schmidt each died from multiple gunshot wounds while Maclaine Schmidt and Heiser each died from a gunshot wound of the head, Banek said.

Banek said Bryan Schmidt died from an intraoral gunshot wound of the head, meaning he was shot inside the mouth.

Crime scene tape stretches along a residential street at night with a police squad car parked nearbyCrime scene tape stretches along the 200 block of Wellington Avenue in Mundelein early Monday morning after five adults were found shot to death inside a home late Sunday night. | Photo: Captured News

The Mundelein Police Department responded around 11:45 p.m. Sunday to the 200 block of Wellington Avenue in Mundelein for a well-being check at a home.

Mundelein Police Department Deputy Chief Rick Wilfenger said the well-being check was requested by a concerned family member who had been unable to contact one of the victims.

A Mundelein police officer and an investigator stand beside a squad car near crime scene tapeA Mundelein police officer and an investigator stand beside a squad car near crime scene tape in the 200 block of Wellington Avenue in Mundelein Monday morning after five adults were found shot to death inside a home late Sunday night. | Photo: Nick Rusin

Responding officers made entry to the home and found five adults, including three males and two females, dead inside, Wilfenger said.

The Mundelein Fire Department responded to the scene and confirmed they were deceased.

An investigator seen through a window working inside a home at nightAn investigator is seen through a window working inside a home in the 200 block of Wellington Avenue in Mundelein early Monday morning after five adults were found shot to death there late Sunday night. | Photo: Captured News

Wilfenger said all five are believed to have been shot at close range with a handgun.

Two handguns were located at the scene.

Investigators carry bags and boxes out of a red house surrounded by crime scene tape on Wellington Avenue in MundeleinInvestigators carry paper bags and boxes out of a home in the 200 block of Wellington Avenue in Mundelein Monday morning after five adults were found shot to death inside late Sunday night. | Photo: Nick Rusin

The Lake County Major Crime Task Force responded to the scene for evidence technician duties, Lake County Major Crime Task Force Spokesman Christopher Covelli said.

Lake County Chief Deputy Coroner Steve Newton said the coroner’s office collected the deceased for autopsies.

Crime scene tape wrapped around a gray Volkswagen Jetta in a parking lotCrime scene tape surrounds a Volkswagen Jetta in the parking lot of Kristan Funeral Home, directly behind a home in the 200 block of Wellington Avenue in Mundelein, Monday morning after five adults were found shot to death inside the home late Sunday night. | Photo: Nick Rusin

Investigators placed crime scene tape around a Volkswagen Jetta in the parking lot of Kristan Funeral Home, which is directly behind the home.

Detectives were seen going door-to-door at neighboring homes.

A Mundelein police officer holding a clipboard speaks with a woman outside a homeA Mundelein police officer speaks with a woman in the 200 block of Wellington Avenue in Mundelein Monday morning as police investigate the deaths of five adults found shot to death inside a home late Sunday night. | Photo: Nick Rusin

Wilfenger said in an update Monday that a preliminary investigation by police detectives indicated the five adults were killed in an apparent murder-suicide.

Four of the deceased were family members while the fifth is believed to have been in a domestic relationship with the suspect, Wilfenger said.

A police officer carries items past a vehicle outside a home at nightA police officer carries items outside a home in the 200 block of Wellington Avenue in Mundelein early Monday morning after five adults were found shot to death inside late Sunday night. | Photo: Captured News

James and Rebecca Schmidt lived at the Wellington Avenue home, Banek said.

“The Mundelein Police Department extends its condolences to the victims loved ones and recognizes the impact this tragedy has had on our community,” Wilfenger said.

Crime scene tape and traffic cones in front of a red ranch home on Wellington Avenue in MundeleinCrime scene tape and traffic cones line the front of a home in the 200 block of Wellington Avenue in Mundelein Monday morning after five adults were found shot to death inside late Sunday night in what police say was an apparent murder-suicide. | Photo: Nick Rusin

Wilfenger said the incident appears to be isolated and there is no threat to the public.

It is unclear what led up to the shootings.

A police officer seen inside a darkened home at nightA police officer is seen inside a home in the 200 block of Wellington Avenue in Mundelein early Monday morning after five adults were found shot to death there late Sunday night in what police say was an apparent murder-suicide. | Photo: Captured News

The incident remains under investigation by Mundelein police detectives, the Lake County Major Crime Task Force and the Lake County Coroner’s Office.

Anyone with additional information relating to the investigation is asked to call the Mundelein Police Department at 847-968-4600.