What is the test for trustworthiness of a defendant in a criminal case?

The Court in Watkins referred to a passage in Duke v. State (1956), 123 A. 2d 745 at 746 (N.H.), cited by Dickson C.J.C. in Corbett, the last sentence of which is of particular relevance to the present case: Lack of trustworthiness may be evinced by his abiding and repeated contempt for laws which he is legally and morally bound to obey, as in the case at bar, though the violations are not concerned solely with crimes involving “dishonesty and false statement.”