Is there any evidence that a jury formed an opinion of guilt before they had heard all the evidence?

There is nothing in counsel's declaration that in any way supports defendant's assertion that the jurors formed the opinion of guilt before they had heard all the evidence. And to the extent counsel's declaration accurately reported what the jurors said to him, those responses concern their mental processes and may not be used to challenge the verdict. (People v. Steele (2002) 27 Cal.4th 1230, 1261, 120 Cal.Rptr.2d 432, 47 P.3d 225[ [A] verdict may not be impeached by inquiry into the juror's mental or subjective reasoning processes ; [t]he only improper influences that may be proved under [Evidence Code] section 1150to impeach a verdict ... are those open to sight, hearing, and the other senses and thus subject to corroboration. ].) Defendant has produced no evidence whatsoever of jury bias or misconduct.