The president of Grand Rapids-based Christian college Calvin University stepped down Monday over reports of “inappropriate messages,” according to the Board of Trustees. The Feb. 26 announcement by the board states it received a report alleging that President Wiebe Boer “engaged in unwelcome and inappropriate communication” toward a non-student member of the university. Boer is not alleged of physical contact or communicating in a sexually explicit manner, the board states, but the “conduct is concerning and inappropriate.”