"Because we have not found evidence that anyone in a position of responsibility at (The Mission Continues) knew of or authorized the misappropriation of charitable resources, we do not believe that the evidence supports an enforcement action against TMC on this issue," Sauer wrote.

"We are happy that the attorney general's office has reached the same conclusion that the circuit attorney's office and Rep. Barnes' committee reached earlier," said Jacober, "and even happier that we can now fully turn our attention to helping America's veterans."

A spokeswoman with The Mission Continues, a veterans charity Greitens founded in 2007, said in October that, as the probe continued, donors were withholding funds and charity monitors were reviewing accreditation, placing the charity in limbo.

The office also investigated whether Washington University violated the Merchandising Practices Act when Greitens may have used grant funds to bolster his political aspirations in 2014 and 2015. Sauer also said Friday he was closing that file without taking action.