DENVER (CBS4) – The young sons of a mother shot to death in Denver’s Observatory Park neighborhood are suing a marijuana edible manufacturer.

The lawsuit claims the company recklessly sold the pot candy to Richard Kirk. Kirk bought the candy an hour before the deadly shooting of his wife Kristine in April 2014.

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The lawsuit is filed on behalf of the children of the couple, who are ages nine, 13 and 15.

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The lawsuit also claims the company failed to warn Kirk about the proper dosage.

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The children are also suing the store that sold the edible.