The presence or absence of any of the above-mentioned factors to be taken into consideration by the judge need not be conclusive on the issue of voluntariness of the confession.
18 U.S. Code § 3501 - Admissibility of confessions
For information regarding constitutionality of this section, as added by section 701(a) of Pub. L. 90–351, see Congressional Research Service, The Constitution of the United States of America: Analysis and Interpretation, Appendix 1, Acts of Congress Held Unconstitutional in Whole or in Part by the Supreme Court of the United States.
1968—Subsec. (c). Pub. L. 90–578 substituted “magistrate” for “commissioner” wherever appearing.