Police in Tulsa, Oklahoma have arrested a woman they caught in the act of mixing chemicals to make methamphetamine inside a Tulsa Walmart store.

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Police say the store's surveillance video shows 45 year old Elizabeth Alisha Halfmoon had been in the store for about six hours before security noticed her acting suspiciously and called police.

Responding officers say she claimed she was too broke to buy the chemicals and cold medicines she needed to make meth.  So she went to Walmart where she took chemicals and materials off the shelves, and was busy mixing a batch when police got there.

Officers immediately moved her and the ingredients out of the store before any of the shoppers could be hurt by them.  No shoppers were evacuated.

Halfmoon is was charged with manufacturing methamphetamine.

Tulsa police say they arrested Halfmoon just last month in what's known on the street as a "smurf sting."  Smurfs are meth cooks or recruits who buy pseudoephedrine that's used to make meth.

That medication is found in many cold and allergy medicines and is the main ingredient needed to make meth.

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