WEST LAFAYETTE, Ind. - A Purdue University professor is mourning the loss of his brother, who was killed when a man opened fire at a Phoenix office building this week.
Mark Hummels, 43, an attorney who was killed in the shooting Wednesday, was the brother of Purdue economics professor David Hummels, the Journal and Courier reported.
David Hummels' wife confirmed the family connection and there was an outpouring of support on social media.
Arthur Douglas Harmon, 70, took his own life after shooting and killing Steve Singer, 48, a call-center CEO, and Mark Hummels, who were meeting to discuss a contract dispute at an office building in north-central Phoenix, police said.
A 32-year-old woman also was shot, but her injuries were not life-threatening.
"We believe the two men were the targets," Phoenix police Sgt. Tommy Thompson said. "It was not a random shooting."
Singer was the CEO of Scottsdale-based Fusion Contact Centers LLC, which had hired Harmon to refurbish office cubicles at two call centers in California.
According to court documents, Harmon was scheduled to go to a law office in the building where the shooting took place for a settlement conference in a lawsuit he filed last April against Fusion.
Fusion said Harmon was paid nearly $30,000 under the $47,000 contract. But the company asked him to repay much of the money when it discovered the cubicles could not be refurbished, according to the documents.
Harmon argued Fusion hung him out to dry by telling him to remove and store 206 "worthless" work stations after the mix-up was discovered. Harmon said Fusion then told him that the company decided to use a competitor.
Harmon's lawsuit had sought payment for the remainder of the contract, $20,000 in damages and reimbursement for storage fees and legal costs.
Mark Hummels represented Fusion in the lawsuit. Harmon represented himself.
The shooting took place in the building where pro tempore Judge Ira Schwartz, who scheduled the mediation, has an office.