Thereafter, we granted the state's petition for certification to appeal, limited to the following issue: "Did the Appellate Court properly conclude that the trial court's jury instruction regarding proof beyond a reasonable doubt was constitutionally infirm?" State v. Jackson, 278 Conn. 902, 896 A.2d 105 (2006). We conclude that the Appellate Court's determination that the instruction on reasonable doubt impermissibly diluted the state's burden of proof was improper, and, accordingly, we reverse its judgment.