OAK LAWN, Ill. --The death of an aide to Illinois Congressman Dan Lipinski has been ruled a homicide.
The Cook County medical examiner's office said Wednesday that 55-year-old Marianne Viverito suffered multiple stab wounds.
Viverito's body was found Tuesday in the basement of her Oak Lawn home after police received a request for a well-being check from an out-of-state police agency. The agency indicated a woman may have been injured in a domestic fight.
Police have said Viverito's death was an "isolated incident" and the public wasn't in danger. Police said they had a suspect in the case, but wouldn't release other details.
Former state senator and current Stickney Township Supervisor Louis Viverito said his daughter was a divorced mother of two adult sons. He said her younger son was in Las Vegas when his mother's body was found.
"Marianne was a beloved and trusted member of my staff, and has been a part of my team during much of my tenure in Congress," Lipinski said in a statement. "She has helped countless of my constituents solve challenges they've faced with the federal government with a smile, good nature, and humor. As with me and my staff, I know that these constituents will miss her greatly."
Ald. Mike Zalewski, whose 23rd Ward office on Archer is adjacent to Lipinski's office, said he and his staff were "devastated" upon hearing the news of Viverito's death.
"We're lucky to be able to call them friends," Zalewski said.
Oak Lawn police are investigating along with the South Suburban Major Crimes Task Force.
Sun-Times Media Wire contributed to this story.