No competent witness in a case shall be excused from answering a question relevant to the matter in issue, on the ground that the answer to such question may tend to establish the fact that such witness owes a debt or is otherwise subject to a civil suit.

(RSMo 1939 § 1896)

Prior revisions: 1929 § 1732; 1919 § 5419; 1909 § 6363