(CNN) An Iowa woman who told police she ran over a teen because she "was a Mexican" has been charged with another attempted murder after police say she hit a 12-year-old boy on the same day.

Nicole Poole Franklin was charged with attempted murder last week after admitting she intentionally ran over a 14-year-old girl with her car and "made a series of derogatory statements about Latinos," police said.

And just an hour-and-a-half after that incident, West Des Moines police said she used racist slurs toward a clerk and customers at a West Des Moines convenience store and threw items at the clerk, landing her assault, theft and public intoxication charges.

Des Moines Police Sgt. Paul Parizek said footage of the incident showed she intentionally hit the 12-year-old boy, who is black, about an hour before she hit the 14-year-old.

The boy was walking along the curb of a Des Moines apartment parking lot when an SUV jumped the curb, ran over his leg and fled, police reported.

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