(CNN) — A small Missouri town’s discovery that a gunman killed seven people and injured another Thursday night began when a girl managed to flee a residence where she heard gunfire.
She ran to a neighbor’s house and called police, say investigators in Tyrone, Missouri.
Authorities then found a trail of death that was so staggering, a state trooper lost count at a news conference.
Seven people, all gunshot victims, were found dead in four residences in the small town. One person managed to survive, and he was found wounded in one of the homes.
The gunman also was found dead after going to another county and apparently shooting himself there. He was identified Friday as Joseph Jesse Aldridge, 36, who was believed to be a cousin to four of the seven slain victims, the Missouri State Highway Patrol said.
And, in a twist to their probe, investigators happened upon another body — that of an elderly woman — in a fifth home, though it appears that she died of natural causes, authorities said.
That person turned out to be the gunman’s mother, Alice L. Aldridge, 74, and a post-mortem exam will be performed Saturday on her body, authorities said.
It was unclear Friday whether her death was connected to the case, Missouri State Highway Patrol Sgt. Jeff Kinder said.
Among the seven slain gunshot victims were two married couples, who were described as cousins of the gunman, authorities said.
They were Garold Dee Aldridge, 52, and wife Julie Ann Aldridge, 47, and Harold Wayne Aldridge, 50, and wife Janell Arlisa Aldridge, 48.
All victims lived within a three-mile radius of each other, authorities said.
The other three victims weren’t identified pending notification of their relatives. They weren’t from the same family, Texas County, Missouri, Sheriff James Sigman.
Investigators spoke to the surviving victim, a male, but weren’t disclosing details, Sigman said.
Suspect Joseph Jesse Aldridge, who used a handgun, had “a minor criminal history” with local authorities, Sigman added.
In summarizing the crime, Kinder momentarily lost track of the death toll at a news conference.
“There are … isn’t that terrible? Lose count. There is actually nine total victims here in this case,” he told reporters.
The carnage was overwhelming, he added.
“In our job, we see a lot of bad stuff, and this is bad,” Kinder said. “This is also hard on the police officers who are working out there. It’s not natural to see that sort of thing.”
The juvenile girl whose police call exposed the mass deaths had been in a residence where two bodies were later found, Kinder said.
Authorities also don’t yet know the relationship between the girl and those two deceased victims, Kinder said.
“I don’t have any information that would confirm any of that other than she was at the residence at the time it started,” he said.
Missouri Gov. Jay Nixon said the state was ensuring that mental health counselors and crisis intervention services would be provided to students in the area and other residents.
“This is a horrific tragedy, and our hearts go out to the victims of these senseless acts and their families,” he said.
The shootings happened in Texas County, home to about 26,000 people.
After police found two bodies in the first residence, investigators found five more bodies and an injured person in three other Tyrone homes, according to Kinder.
The elderly woman who’s believed to have died of natural causes was found in a fifth residence after “investigators were somehow led to that residence after this was all placed in motion,” he said.
The suspect’s body was found in a vehicle in neighboring Shannon County, Kinder said.
Tyrone is about 135 miles (217 kilometers) southwest of St. Louis.
It wasn’t immediately clear if any of the victims were of school age, but news of the deaths has shaken the community, the superintendent of the area’s schools said Friday.
“There is a lot of speculation right now, and we just don’t have the information. The area is within the school district; these are my families,” said Scott Dill, superintendent of the Houston R-1 School District. “We run buses out there daily.”
Classes for the district’s 1,000 students are in session Friday, in part to give them a sense of normalcy, he said.
“We do have counselors available, and other offers from other districts to help out. As a small town, we all cry together. My principals are all assessing the situation now, and we will make a determination on what to do next,” Dill said.
By Michael Martinez and Jason Hanna of CNN
CNN’s Amanda Watts contributed to this report.