Man accused in 2 Idaho killings now suspected in Ariz. shooting

BOISE, Idaho – A 21-year-old man who is accused of killing a University of Idaho student and is under investigation in the separate slaying of a Boise State University student several days later is now believed by authorities to have shot and wounded a man in Tucson, Ariz., the Ada County sheriff’s office said Friday.

John Joseph Delling, a former Boise resident who last lived in Antelope, Calif., has been linked to the Arizona shooting of Jacob J. Thompson, 23, on March 20, Sheriff Gary Raney said. Thompson, who is originally from Boise, is now in rehabilitation after being shot in the face and chest, Raney told a news conference.

Delling was arrested Tuesday by police in Sparks, Nev., on a stolen car warrant issued by Ada County and a first-degree murder warrant issued by Moscow police in the death of UI senior David Boss, a former high school classmate of Delling at Timberline High School in Boise. Thompson also attended Timberline, Raney said.

Washoe County, Nev., sheriff’s Deputy Brooke Keast said Delling has declined to talk to reporters. It was not known if he was represented by a lawyer.

Boss, a 21-year-old history major, was killed early on March 31 in his off-campus apartment, shot twice in the head, police said.

Police have also identified Delling as a suspect in the death of Bradley Morse, 25, whose body was found early Tuesday in a Boise city park pond near an office of the Idaho Department of Parks and Recreation where Morse worked as a janitor.

Family and acquaintances of Delling have said the young man was troubled and acting increasingly erratic before the slayings.

Delling apparently drove some 6,500 miles across much of the West, including California, Idaho, Oregon, Washington, Utah, Arizona and Nevada, during a four-week period prior to the killings in Idaho, Raney said.

Authorities fear there may be other victims.

”We’ve been overwhelmed with these possibilities. Who might have been victims if he was planning another shooting? Why did he drive 6,500 miles in one month?” Raney said. ”What happened between March 20 and March 30?”

Police have sent alerts to other departments along Delling’s alleged route, trying to see if any other unsolved shootings happened during March, Raney said. Investigators are seeking help from the public as well.

”He had to eat, he had to sleep, he had to stop and get gas,” Raney said. ”He had to talk to people. We’re hoping those people can help.”

”There is certainly a long pattern of behaviors that put people in fear,” he said.

Thompson didn’t know why he was targeted, Raney said, adding that a man believed to be Delling lured Thompson from his home in Arizona by tapping on the window and telling him he needed to move his truck, which was parked in front.

As Thompson moved the truck, he asked a man sitting on a bicycle if he was the one who wanted the truck moved, Raney said. The man on the bicycle approached the truck and fired five times at the driver’s side door, Raney said.

Thompson was hit three times, according to police, with one bullet hitting his face and lodging in the back of his head.

Despite his injuries, Thompson, a student at the University of Arizona, is now able to speak and identified Delling from a photo lineup, Raney said.

Investigators are struggling to discover exactly how the four men were connected. Morse attended Meridian High School in a town next to Boise, while Boss, Thompson and Delling all attended Timberline High.

”Often crimes are a matter of who did it. This is a matter of why did he do it,” Raney said. ”Thompson has lived at the University of Arizona for the past three years. Was it something that happened four years ago? Eight years ago? Ten years ago?”

Idaho authorities expect to prosecute Delling for the slayings before he would go to Arizona to face possible charges there.

”He’ll come to Idaho and be charged with the murders,” Raney said.

The gun that was used to shoot Thompson was not the same weapon that was used in the two Idaho killings, Raney said. Police believe the gun used in the Idaho slayings was purchased on March 26 in Boise, he said.

Talk to us

> Give us your news tips.

> Send us a letter to the editor.

> More Herald contact information.

More in Local News

Olivia Vanni / The Herald 
The Mukilteo Lighthouse. Built in 1906, it’s one of the most iconic landmarks in Snohomish County.
The Mukilteo Lighthouse. Built in 1906, it’s one of the most iconic landmarks in Snohomish County. (Olivia Vanni / The Herald)
Mukilteo mayor vetoes council-approved sales tax

The tax would have helped pay for transportation infrastructure, but was also set to give Mukilteo the highest sales tax rate in the state.

Marysville Mayor Jon Nehring gives the state of the city address at the Marysville Civic Center on Wednesday, Jan. 31, 2024, in Marysville, Washington. (Ryan Berry / The Herald)
Marysville council approves interim middle housing law

The council passed the regulations to prevent a state model code from taking effect by default. It expects to approve final rules by October.

x
State audit takes issue with Edmonds COVID grant monitoring

The audit report covered 2023 and is the third since 2020 that found similar issues with COVID-19 recovery grant documentation.

Bothell
Bothell man pleads guilty to sexual abuse of Marysville middle schoolers

The man allegedly sexually assaulted three students in exchange for vapes and edibles in 2022. His sentencing is set for Aug. 29.

Larsen talks proposed Medicaid cuts during Compass Health stop in Everett

Compass Health plans to open its new behavioral health center in August. Nearly all of the nonprofit’s patients rely on Medicaid.

Snohomish County Health Department Director Dennis Worsham on Tuesday, June 11, 2024 in Everett, Washington. (Olivia Vanni / The Herald)
Snohomish County Health Department director tapped as WA health secretary

Dennis Worsham became the first director of the county health department in January 2023. His last day will be July 3.

Police Cmdr. Scott King answers questions about the Flock Safety license plate camera system on Thursday, June 5, 2025 in Mountlake Terrace, Washington. (Olivia Vanni / The Herald)
Mountlake Terrace approves Flock camera system after public pushback

The council approved the $54,000 license plate camera system agreement by a vote of 5-2.

Community members gather for the dedication of the Oso Landslide Memorial following the ten-year remembrance of the slide on Friday, March 22, 2024, at the Oso Landslide Memorial in Oso, Washington. (Ryan Berry / The Herald)
The Daily Herald garners 6 awards from regional journalism competition

The awards recognize the best in journalism from media outlets across Alaska, Idaho, Montana, Oregon and Washington.

U.S. Rep. Rick Larsen talks with Volunteers of America leadership to discuss the consequences of the federal cuts on Monday, June 30, 2025 in Everett, Washington. (Olivia Vanni / The Herald)
Federal cuts to LGBTQ+ youth hotline to hit Everett center

U.S. Rep. Rick Larsen, D-Everett, visited the call center Monday to discuss impacts of the cuts, including longer wait times and staff layoffs.

U.S. Rep. Suzan DelBene, right, goes over a Chinook Marsh Project map with Snohomish County Surface Water Management’s Michael Rustay, left, and Erik Stockdale, center, at the project site on Tuesday, Aug. 13, 2024 in Snohomish, Washington. (Olivia Vanni / The Herald)
County receives $10 million grant for floodplain management

The state Department of Ecology funding will go toward 13 projects across the county working to restore habitat and support climate resiliency.

The Washington state Capitol. (Photo by Jacquelyn Jimenez Romero/Washington State Standard)
These Washington laws take effect July 1

Fee hikes for hunting and fishing licenses, workplace protections for immigrants and… Continue reading

Everett
Everett could levy fines for non-emergency lift assists at care facilities

The ordinance intends to discourage licensed care facilities from calling 911 to perform lift assists in a non-emergency situation.

Support local journalism

If you value local news, make a gift now to support the trusted journalism you get in The Daily Herald. Donations processed in this system are not tax deductible.