Brazil's health ministry says a doctor is suspected of killing seven terminally ill patients in a southern Brazilian hospital.
A ministry press officer says Virginia Helena Soares de Souza and seven assistants are suspected of injecting the patients with "drug cocktails" and of tampering with their respirators.
The press officer declined to be identified because she was not authorized to comment on the case.
Souza was arrested in Curitiba last month but released on bail a week ago pending the outcome of the investigation.
The press officer says the Health Ministry is reviewing the medical records of 300 other patients that were under de Souza's care. She did not provide details and did not say if they had died.
Paul Kloos died after a manure pit exploded Friday morning, according to the Marathon County Sheriff's Department.
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