WOODSTOCK – The Huntley man believed to be responsible for a Memorial Day domestic shooting that left his brother dead and himself in critical condition has died, authorities said.
Mark R. Grundei, 50, died Wednesday evening of severe head injuries at a hospice care center in Woodstock, nine days after the incident at 11469 Morning Glory Lane, Huntley, and after being moved from Advocate Sherman Hospital in Elgin, according to a news release from the Huntley Police Department.
The preliminary autopsy report said the cause of death was a gunshot wound to the head with an entrance wound but no exit wound. The bullet was recovered from the back of the head during the autopsy, according to a press release from McHenry County Coroner Anne Majewski.
Police hadn't pressed charges but believed Grundei shot and killed his brother, Robert A. Grundei, 48, of Coral Springs, Florida, before turning the gun on himself. Their 81-year-old mother, Alyce Grundei, suffered a graze wound but was treated and released.
Police have said the two brothers were arguing over living arrangements, because Robert Grundei was visting from his Florida home and making plans to live with Alyce Grundei, which would have forced out Mark Grundei, who currently lived with his mother, authorities said.
The family also was mourning the death of another brother to the men, Brian, who drowned weeks earlier in Lake County.
An investigation into the incident is ongoing, the release said.
Police are awaiting final results from Robert Grundei's autopsy through the Kane County Coroner's Office, and have submitted evidence from the Northeastern Illinois Regional Crime Laboratory, the release said.
Police were called to the Huntley home by Alyce Grundei just after 5 p.m. on Monday, May 26. When they arrived, she was at the front of the house holding the five-shot, .38 revolver used in the shooting and was bleeding from the head.
Police have said the gun belonged to Mark Grundei.
Huntley Deputy Chief Michael Klunk said Thursday that not all five shots were fired from the weapon. He said all rounds had been accounted for but declined to say how many were fired.
Police originally believed Robert Grundei suffered a gunshot wound to the head and shoulder but have since said the injury to the head wasn't the result of a bullet. Preliminary autopsy results from the McHenry County Coroner showed he died from a gunshot wound to the back.
"We released information based on the injuries we had seen," Klunk said. "We found out later he was shot in the back and there was a trauma to the head."
Authorities have submitted DNA of all three people involved and gunshot residue to the crime lab, he said.
The home at 11469 Morning Glory Lane had been placed on the real estate market prior to the incident. Alyce Grundei was released from the hospital to family members in the area on the night of the shooting.
"It's kind of a tragic story all the way through," Klunk said.