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A woman who boasted her 'safe personality' made it OK to buy a gun has been charged with shooting up a car carrying a child just weeks later.

Fiona McCrossin, 22, from Las Cruces, New Mexico, America, was charged with aggravated assault with a deadly weapon.

She also managed to shatter the back window of her own vehicle with her firearm, according to Las Cruces Police Department (LCPD).

But weeks earlier she seeningly stated her ‘safe’ personality made her suitable for gun ownership when she posted a picture of herself on Facebook group DC9.

Other Facebook users were quick to question whether her gun ownership was such a great idea.

(Image: Facebook)

One user wrote: "I don't feel confidently about you owning a handgun."

Fiona replied in outrage that it was "incredibly ridiculous" for someone to feel unsafe about her owning a gun.

But just weeks later, local media reported that a young woman and her 13-year-old sister were in a car when a Mazda Sedan, allegedly driven by McCrossin, approached.

Both drivers began honking at each other and “both drivers engaged in aggressive driving,” a police statement quoted on the Albuquerque Journal stated.

McCrossin then pointed a handgun at the Lexus and discharged one round, according to the LCPD.

“Police learned the round fired by McCrossin shattered the back window of her own vehicle,” a police statement said.

McCrossin fled but was found a short time later at an apartment on Roadrunner Parkway, Las Cruces Sun-News reports.

Police found a spent .380 caliber shell casing in her car and also recovered the gun she’s believed to have used.

McCrossin was booked into the Doña Ana County jail without bail.

Las Cruces Police Department confirmed to Mirror Online that McCrossin was released from the detention center and her case is pending trial.