article_snippet: Police in Chicago have launched a murder investigation after a 98-year-old former nurse was found to have died of morphine and hydrocodone toxicity while living in a care home.
article_snippet: The Cook County Medical Examiner has investigated three suspicious deaths at the Holland Home in South Holland, Chicago.
article_snippet: Investigators are preforming further tests on Mr Rundin's body who died on March 7, more than a month after Mr Rundin's fell ill.
highlights_snippet: An initial post mortem was inconclusive but further tests found evidence .
  
highlights_snippet: The Cook County Medical Examiner's office found evidence of homicide .