The Brief A partial head was recovered from the Fox River in McHenry County on Wednesday night, prompting a death investigation. The remains have not been identified, and authorities have not said whether they are connected to last weekend's fatal Fox River boat crash. A death investigation is underway after a partial head was recovered from the Fox River in McHenry County, officials said. Authorities have not said whether the remains are connected to last weekend's fatal boat crash on the Fox River. The backstory:The discovery comes less than a week after a deadly boat crash on the Fox River that killed 49-year-old Magdalena Jablonska.