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JOLIET, Ill. — The bodies of a suburban Chicago man and a woman were found inside a residence in what authorities say was a murder-suicide that was apparently prompted by the man’s concern that the two of them had contracted the coronavirus.

In a news release, the Will County Sheriff’s Office says that deputies who were dispatched to a home in Lockport Township to conduct a welfare check discovered the bodies of 54—year-old Patrick Jesernik and 59-year-old Cheryl Schriefer. The two, whose bodies were found in separate rooms in the residence, had each been shot once and a gun was near Jesernik’s body.

The investigation determined that Jesernik had shot Schriefer in the back of the head before shooting himself.

According to the release, relatives told detectives that Jesernik had been frightened that he and Schriefer had contracted the COVID-19 virus and that Schriefer was having difficulty breathing.

The relatives told investigators that Schriefer had been tested earlier in the week but they did not believe she received the results yet. According to the release, an autopsy revealed determined that Jesernik and Schriefer tested negative for the virus.