Prison officials said he had been in poor health, with heart disease and other afflictions. Calabrese, himself, outlined an assortment of medical problems, including an enlarged heart, during a sentencing hearing in 2009.
There were reports that Calabrese had been seriously ill for more than a year. His attorney told the Chicago Tribune that Calabrese had been taking seventeen different medications for a variety of health problems.
Read more at Writers of Wrongs:
Outfit killer Calabrese dies on Xmas 2012
https://www.writersofwrongs.com/2018/12 ... -xmas.html