If you suspect that the board president is engaging in unethical practices with respect to the non-profit, you need to carefully read the bylaws as to the internal mechanisms of the entity and see how this might allow for her removal. If the entity has an attorney representing it, you should consult with the attorney with respect to your concerns.I assume the non-profit is a corporation. If so, contact your state's department of corporations concerning your concerns as well and suggest an investigation into this non-profit.