Does the erroneous admission of a confession that was coerced or obtained in violation of Miranda require reversal?

The erroneous admission of a confession that was coerced or obtained in violation of Miranda does not require reversal if the error was harmless beyond a reasonable doubt. (People v. Cahill (1993) 5 Cal.4th 478, 509; In re Z.A. (2012) 207 Cal.App.4th 1401, 1422.) While we find no error in admitting defendant's confession, we also find there is no reasonable possibility that defendant would have obtained a more favorable verdict had the trial court excluded that portion of defendant's confession that followed the alleged invocation of Miranda rights and coercive police conduct.