What is the test for alleging that a prosecutor's conduct violates the Fourteenth Amendment?

"A prosecutor's conduct violates the Fourteenth Amendment to the federal Constitution when it infects the trial with such unfairness as to make the conviction a denial of due process. Conduct by a prosecutor that does not render a criminal trial fundamentally unfair is prosecutorial misconduct under state law only if it involves the use of deceptive or reprehensible methods to attempt to persuade either the trial court or the jury. Furthermore, and particularly pertinent here, when the claim focuses upon comments made by the prosecutor before the jury, the question is whether there is a reasonable likelihood that the jury construed or applied any of the complained-of remarks in an objectionable fashion." (People v. Morales (2001) 25 Cal.4th 34, 44; People v. Cash (2002) 28 Cal.4th 703, 733.)

"As a general rule a defendant may not complain on appeal of prosecutorial misconduct unless in a timely fashion-and on the same ground-the defendant made an assignment of misconduct and requested that the jury be admonished to disregard the impropriety. [Citation.]" (People v. Samayoa (1997) 15 Cal.4th 795, 841.) "A defendant will be excused from the necessity of either a timely objection and/or a request for admonition if either would be futile. [Citations.] In addition, failure to request the jury be admonished does not forfeit the issue for appeal if '"an admonition would not have cured the harm caused by the misconduct."' [Citation.]" (People v. Hill (1998) 17 Cal.4th 800, 820.)