'Captain of the Guard' in the Bible

Before Jeremiah could turn to leave, the captain of the guard added, "Go back to Gedaliah, the son of Ahikam and grandson of Shaphan, whom the king of Babylon appointed to govern the towns of Judah. Go back and live with him among the people. Or go wherever else you choose." Then the captain of the guard gave Jeremiah some food and a present and let him go.