Here is a more detailed article about it:
Coroner says patient's death is a homicide
http://www.chicagotribune.com/news/local/chicago/chi-0609150317sep15,1,1209480.story?coll=chi-newslocalchicago-hed
Freepers in Waukegan, I suggest you avoid that Hospital!
CODs are generally either natural causes, accidental death, homicide, suicide, or undetermined. Within the general categories, there are other subsets.