Killed was Joseph Ziegler, 19, of 380 Payson St., according to the Cook County Medical Examiner’s office. Ziegler, who was shot in the head, was pronounced dead on the scene at an unidentified time, according to the medical examiner's office.

Ziegler was a senior at Schaumburg High School last year. He and his younger sister lived with their father in the Payson Street house for six years.

Ziegler's sister discovered his body around 6 p.m. Thursday evening.

"This is such a tragedy,'' said neighbor Clare Orlandino, "and I guess they still don't know who has done this. I'm sure the neighbors are shook over all of this, and concerned.''

Police canvassed the area, asking neighbors if they had heard or seen anything. Some residents said they got the impression the shooting was not random.

"I could tell that it didn't seem like it was a home invasion or anything like that," said neighbor Sonja Meshcha. "I think it was something a little closer to home."

Residents said the area is very quiet, but in the past they called police to the Ziegler home because of loud parties.

"There's been a lot of activity there, kids coming and going," Orlandino said. "It's just so tragic."

At 5:30 p.m. Thursday, police responded to the Payson Street address after receiving a 911 call, according to Hoffman Estates Police Lt. Rich Russo.

Russo declined to say whether there were signs of forced entry or where inside the home Ziegler’s body was found

Russo said the victim had been shot and the Major Case Assistance Team, a SWAT team put into effect after the 1993 Brown’s Chicken murders in northwest suburban Palatine, responded Thursday night after police requested their assistance.

Twenty to 30 investigators can be utilized using MCAT, Russo said.

“I would assume they hit the ground running,’’ with their probe, according to Russo, who said they are seeking to talk to any witnesses or suspects.

No one was in custody Friday morning, Russo said. An autopsy is scheduled for later Friday.