Colored flags in the yard of 16054 Burgess Road, in La Pine, mark evidence related to a shooting Thursday night where two people were shot and a third is believed to have committed suicide.

LA PINE — The 911 calls that reported a shooting Thursday night came from an address familiar to law enforcement.

Deputies had been called eight times this year to the La Pine home where two people were shot and a third is suspected of committing suicide.

Each of the previous calls came in as a domestic dispute, a scenario investigators believe was repeated a ninth time Thursday night when Jack Rummel Dennis Sr., 46, apparently shot 35-year-old Reggie Ray Ortega and 39-year-old Maryann Lynn Hilton in the home they all shared.

The eighth 911 call to the residence happened March 13, according to emergency dispatch records, three weeks to the day before the shooting.

Court records show a tumultuous history between Hilton and Dennis, both having filed abuse prevention restraining orders against the other that were ultimately dismissed. And Ortega has more than a half-dozen criminal convictions in the 1990s that include kidnapping and escape from prison.

Deschutes County sheriff’s deputies were called to the 16000 block of Burgess Road at about 9 p.m. Thursday on a report that someone in the Evergreen Park Subdivision had been shot, according to Sheriff’s Capt. Marc Mills.

Next door neighbor Dan Luker said he didn’t hear any shots fired, although his house is about 30 feet away. But he did hear someone outside his front door calling for help.

“I looked down and I see a young man holding his stomach,” Luker said. “And I was kind of amazed. I honestly thought he was going to die right there.”

While deputies were on their way, a second 911 call came in reporting another person shot, Mills said.

Deputies arrived within minutes, Luker said, and started giving first aid to the man, now identified as Ortega.

Authorities went into the home where the shots were fired and found Hilton suffering from life-threatening injuries and Dennis dead, Mills said.

Ortega and Hilton were taken to St. Charles Bend for treatment, but a hospital spokeswoman said Friday she could not legally release any information.

Investigators believe Dennis used a shotgun and a handgun to shoot Ortega and Hilton before shooting himself.

“We have no indication that anyone other than Dennis fired a weapon,” Mills said.

He added that Dennis’ injuries matched one of the weapons he used.

By Friday morning, authorities had a search warrant allowing them to go in and process the crime scene. Investigators from the Oregon State Police crime lab wore white hazmat suits and air masks as they carried evidence bags in and out of the brown, one-story home with a single attached garage.

A trail of bright yellow evidence markers dotted the driveway in a pattern that led to Luker’s home.

Early in the afternoon, deputies walked three dogs, one by one, out of the house where the shootings occurred.

Luker said he knew that deputies had been called to his neighbors’ house before but didn’t think there was an ongoing problem.

“The only thing (Dennis) said is that they’d had a quarrel or two, but he acted like it was all over and it was good,” Luker said.

Luker recently bought a new modular home and said Dennis helped him with the installation.

“Anything you asked him, he’d do for you,” Luker said. “He was always polite and never even used a cuss word. I never heard him say a bad word or talk bad about anybody.”

Mills said investigators were unsure Friday exactly what prompted the shooting. Based on interviews with Hilton and Ortega, officials believe the incident was a domestic dispute, but they don’t know why Dennis turned to violence.

“We do need to continue the investigation to try to determine one, the motive and, two, to make sure that we have no other criminal involvement by the other parties,” Mills said.