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The Arizona Department of Child Safety on Tuesday said it had a case open on Yui Inoue prior to her being charged with murder in the death of her two children.
On March 2, the department opened an investigation on Inoue after receiving a report of neglect of Kai Inoue, 7, claiming that Yui Inoue took Kai somewhere unknown, according to a department statement.
Police located Yui and Kai Inoue behind a convenience store, after which Kai was taken to his father and Yui Inoue was taken to a psychiatric hospital, the statement said.
The department said that while an investigator did not find visible signs of neglect or abuse, the investigation into the family was still open up until the death of both Kai Inoue and his 9-year-old sister, Mia Inoue.