A factory shooting Monday near Chicago left four workers dead and two ISU students fatherless.Engineer Michael Brus, 48, died after ex-employee William Baker opened fire at Navistar International Corp., killing three others and wounding four before turning the gun on himself. Brus had been working at the factory for 12 years.In the aftermath, fall 2000 ISU graduate Jared Brus and Jason Brus, sophomore in animal science, were left without a father, and Lynn Schroeder, field lab technician for horticulture, lost his cousin.”It was a case of him being in the wrong place at the wrong time,” Schroeder said. “It was a very senseless act.”Baker, 66, entered Navistar about 10 a.m., spraying bullets. He was carrying a golf bag filled with an AK-47 fully automated assault rifle, a .30-caliber hunting rifle, a 12-gauge pump shotgun and a .38-caliber revolver. He had been scheduled to embark on a federal prison term Tuesday after stealing engine parts from the plant in 1993 and 1994.Arleen Brus, Michael Brus’ mother, said her son normally wasn’t scheduled to work at 10 a.m.”He always works second shift, but I guess he was put on first shift,” she said. “That’s why he was there.”Michael Brus also is survived by his wife, Terri, Arleen Brus said. The couple had been married 27 years.”She’s doing a little better now,” Arleen Brus said. “They were very close, even though they didn’t see much of each other. She worked during the day and he worked at night.”Schroeder said he grew up on a farm eight miles away from the Brus’ near Walcott, Iowa. He said he will always remember the birthday parties and family gatherings he and his cousin enjoyed together.”I just remember him as very down to earth and very family oriented,” Schroeder said. “He was just a normal guy who worked hard and provided for his family. He was even thinking of retiring soon so he could spend more time with his family.”Arleen Brus said even though Michael Brus was contemplating retirement, he wanted to work a few more years.”He wanted to move down south where it was warm,” she said. “He didn’t like winters too well.”She said her son was an excellent father to his two sons, even though he was a “workaholic.””He took them scuba diving in the Cayman Islands and would have fun by just running around with them,” she said. “He also put them both through college.”Schroeder said he didn’t know what the future holds for Michael Brus’ two children. As of Wednesday, Jared and Jason Brus had returned home to Hinkley, Ill., to be with their mother.”My biggest concern is for his kids,” he said. “I don’t know if Jason is going to have to miss a lot of school or if they’re both going to try and stay home with their mother. I don’t know how this is going to affect their family — I hope they come out of it OK.”In the meantime, Arleen Brus said she and her husband, Melvin, have been coping well with their loss and are busy helping Terri Brus with the funeral arrangements.”He’s going to be cremated, and the family is going to keep the ashes,” she said.There will be a visitation Friday from 4 p.m. to 8 p.m., and the funeral service will be at noon Saturday. Both will be held at the Bentley Funeral Home in Durant, Iowa.The Associated Press contributed to this story.