CANYON COUNTY, Idaho (Court TV / Scripps News Idaho) — A father accused of killing his daughter and threatening his son emotionally admitted his crimes in a Canyon County courtroom Wednesday.

Delbert Cornish appeared in court to plead guilty to murder on Nov. 12, 2025. (Court TV)

Delbert Cornish formally pleaded guilty to first-degree murder for the Aug. 18, 2025 shooting death of his daughter, Hope “Onyx” Cornish. In a tearful courtroom confession, Cornish told the judge, “I pulled the trigger. I shot my daughter.”

When asked by the judge if he understood what he was doing when he fired the 9-millimeter handgun, Cornish responded, “Yes.”

Prosecutors say Cornish also shot and killed Onyx’s pet cat during the same incident and later threatened his teenage son, Lucian , who managed

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