What is the current state and federal law on prosecutorial misconduct?

"The applicable federal and state standards regarding prosecutorial misconduct are well established. ' "A prosecutor's ... intemperate behavior violates the federal Constitution when it comprises a pattern of conduct 'so egregious that it infects the trial with such unfairness as to make the conviction a denial of due process.' " ' [Citations.] 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 court or the jury.' " ' [Citation.] 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.] Additionally, 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. [Citation.]" (People v. Samayoa (1997) 15 Cal.4th 795, 841.)