GREEN VALLEY (3TV/CBS 5) -- This gender-reveal party cost the State of Arizona over $8 million. 

In September, off-duty Border Patrol Agent Dennis Dickey, pleaded guilty to starting the Sawmill Fire. 

The fire started on April 23, 2017, near Green Valley, 25 miles south of Tucson.

The 37-year-old Border Patrol agent started the fire by shooting a rifle at a target filled with explosive powder.

In a new U.S. Forest Service video obtained by Arizona's Family, the target reads "boy" and "girl" on it. Once the shot is fired at the target, a blue powder appears and a brush fire starts moments after. 

[WATCH: Click here to watch the moment the Sawmill Fire started]

Dickey, who reported the fire immediately, agreed to pay restitution totaling close to $8.2 million. He also agreed to five years probation and to make a public service announcement with the U.S. Forest Service about the cause of the fire. 

The Sawmill Fire burned nearly 47,000 acres in southern Arizona. 

[APP USERS: Check out side-by-side photos of the moment the fire started]


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