So long as double jeopardy has not attached, which generally occurs when the jury is sworn or when the first witness is sworn in a bench trial, yes charges could be reinstated. The reinstated charges would have to be pursued within the time periods provided for in La. Code of Crim. Proc. arts. 571 et seq. (You have not given me any information on the nature of charges or the chronology, so I can't give any further information on this point.) At the same time, as a practical matter, the vast majority of the time, if a DA refuses the charges or drops them prior to trial, they are not reinstituted.
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