Does the Due Process Clause of the Fourteenth Amendment require a new trial when a witness's in-court identification of the defendant is tainted by suggestive pretrial conduct by the prosecution, undermining the defendant's primary defense, and the trial court's curative instructions fail to mitigate the prejudicial impact?

Does the Due Process Clause of the Fourteenth Amendment require a new trial when a witness’s in-court identification of the defendant is tainted by suggestive pretrial conduct by the prosecution, undermining the defendant’s primary defense, and the trial court’s curative instructions fail to mitigate the prejudicial impact?