Police found the victim dead on the scene. The medical examiner's office has identified him as Stuart Cole, 69.
Police were at the scene for hours Tuesday morning, processing evidence, going in and out of the house all through the night.
His parents filed an order of protection in 2007 where it stated that the son threatened to stab his father in the heart. After the order expired, there were no more filed.
The son has been arrested several times for domestic battery, and for years, police say, the son had been treated for mental illness.
"He does have a lot of mental issues and has been treated for them for several years now," said Arlington Heights Police Commander Kenneth Galinski.
Arlington Heights police responded to 2645 N. Stratford Road just before midnight after they received the call from the angry man. It would be the first of three calls that originated from Stratford Road on the quiet tree-lined block.
"We received a call about five minutes to midnight from the suspect," said Galinski. "He very irate and he was screaming into the phone that he had just murdered his father."
Police received 911 calls from the mother and sister, who said that the suspect called to admit what he did, apparently ten minutes after he called police. Police say they have been to the home several times in the past because the son was being abusive to his parents. They also say he is physically imposing.
"He was a very muscular person. He trained in ultimate fighting and the martial arts. At one period, it looked like he had stopped doing that because he had slimmed down, but I was told he recently started to bulk back up," said Galinski.
When police got to the home, a man appeared at the front door. Police say he was highly agitated and making admissions as to what happened inside the home. Authorities were able to talk him out and he was taken into custody. Police say he uttered something about not getting along with his father.
"It is sad to see, especially when a parent takes care of their children like they do, and they raise them, give them the best that they can," said Galinski.
When police arrived, they were worried about a barricade situation, and neighbors were warned.
"I looked out the window about 12 o'clock last night, and there were just squad cars and all the streets were blocked and you could see guys running back and forth," said neighbor Nick Passannante. "I didn't know what was going on, and then we got an automated phone call saying: stay away from your doors and windows."
"I was scared out of my mind, my heart was racing," said neighbor Michelle Frukacz. "I saw 25 cop cars, three ambulances."
Neighbors say they were once ordered by police to hide in their basements last Halloween when the man was running up and down the street, threatening his parents.
"There was an episode a couple months ago where he was here and threatened his dad. He ran through one of the backyards, and I thought they had gotten him but evidently not," said neighbor Leslie Cook.
One neighbor recalls seeing him crash his parents' car because he was allegedly angry at his parents.
"He drove it into the tree," said neighbor Tom Kosmalski. "We did not know what to think."
Kosmalski says he feels it was only a matter of time before something tragic happened, since police had been called to the home several times involving incidents with the son.
"We didn't know exactly what was happening, although, my wife and I, we sort of had a feeling if it's not the end of the world it's gotta be something happening across the street," said Kosmalski.
The suspect's name has not been released. Apparently, he told police he was not feeling well, so they took him to Northwest Community Hospital where he is being treated by medical staff.
Neighbors say Stuart Cole was a nice, quiet man who was always outside working on his yard. His wife was not home at the time of the apparent deadly beating.
No charges had been filed as of Tuesday evening.
This is the second time in Arlington Heights that a son is accused of killing his father recently. Exactly two months ago, 55-year-old George Nellessen was found beaten and stabbed. Robbery was the motive for that murder. Police do not know the motive for Stuart Cole's murder.