Does a threat or promise to the accused compel the accused to give a confession?

the accused to tell the truth when unaccompanied by either a threat or a promise does not render a subsequent confession involuntary. [Citation.] The distinction that is to be drawn between permissible police conduct on the one hand and conduct deemed to have induced an involuntary statement on the other 'does not depend upon the bare language of inducement but rather upon the nature of the benefit to be derived by a defendant if he speaks the truth as represented by the police.' [Citation.] Thus, '[when] the benefit pointed out by the police to a suspect is merely that which flows naturally from a truthful and honest course of conduct,' the subsequent statement will not be considered involuntarily made. [Citation.] On the other hand, 'if . . . the defendant is given to understand that he might reasonably expect benefits in the nature of more lenient treatment at the hands of the police, prosecution or court in consideration of making a statement, even a truthful one, such motivation is deemed to render the statement involuntary and inadmissible. . . .'" (People v. Jimenez (1978) 21 Cal.3d 595, 611-612, overruled on other grounds in People v. Cahill (1993) 5 Cal.4th 478, 509-510, fn. 17.)