DENVER (CBS4)– A Denver accused in the shooting death of his wife has been charged with first-degree murder.

Richard Kirk was officially charged on Friday afternoon by Denver District Attorney Mitch Morrissey.

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Kirk, 47, allegedly shot and killed his wife, Kristine Kirk, 44, at their home in the 2100 block of South St. Paul Street on Monday night.

Kristine Kirk (credit: Facebook)

Kristine Kirk (credit: Facebook)

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Kristine was on the phone with 911 dispatchers when the shooting happened. The couple’s three children were home at the time.

Kristine told dispatchers her husband bought and ate the marijuana candy and may have also taken prescription pain pills before he started hallucinating and frightening the couple’s three children.

Richard Kirk (credit: Denver Police Department)

Richard Kirk (credit: Denver Police Department)

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According to the search warrant, a detective who interviewed Richard after the killing noted that he appeared to be on drugs, based on his speech and inability to focus, according to the warrants. Police said he was rambling and confessed to killing his wife.