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.' " ' (People v. Gionis (1995) 9 Cal.4th 1196, 1214; People v. Espinoza (1992) 3 Cal.4th 806, 820.) Conduct by a prosecutor that does not render a criminal trial fundamentally unfair is

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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.' " ' (People v. Espinoza, supra, 3 Cal.4th at p. 820.)" (People v. Samayoa (1997) 15 Cal.4th 795, 841.)