An Idaho father who allegedly killed his adopted daughter and had plans to kill his other children appeared in court this week, as the case against him appeared to expand.

Delbert Cornish, 51, is accused of first-degree murder in the killing of 18-year-old Hope "Onyx" Cornish. On Wednesday, he appeared in Canyon County court, looking stoic as he had one charge added and another upgraded against him.

The defendant is now charged with assault with intent to commit murder — instead of aggravated assault — and he also faces a misdemeanor animal cruelty charge for allegedly killing his daughter's cat, Boise ABC affiliate KIVI reported . Delbert Cornish is also charged with possession of a deadly weapon.

Law&Crime previously reported on the "horrific act of family violence." On Aug. 18, at a

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