Some critics believe that prosecutors should have used Grogan as their last witness to emphasize and weave together the strongest points of the case. But the prosecution will have another chance to summarize the case in closing arguments.
"The case, instead of ending with a bang — which you want to do as a prosecutor — just petered out into minor points," said former prosecutor Dean Johnson. "The evidence is there, and you have to work for it and you have to look for it."
Peterson's deception could work to his advantage. He said his hair changed color after he swam in his friend's pool. But the friend testified that Peterson had never been at his pool. His alibi the day Laci disappeared — that he had fished near the Berkeley Marina — placed him near the area where she and the remains of the boy they planned to name Conner washed ashore.
Peterson's apparent fumbles, especially in the days before his arrest, and his lies to Frey, some experts say, seem laughable and hardly reflective of someone who could leave no traces of physical evidence of a murder. Prosecutors, some observers say, will have to reconcile these two Scott Petersons.
"The bottom line is that there isn't much physical evidence at all connecting Scott Peterson to this case," Cron said. "What you may hear the defense say is that the prosecution can't have it both ways. He's either this mastermind murderer who has planned the crime without leaving any traces of evidence anywhere and if that's the case, then why does he sound like such a dumb idiot when talking to his mistress on the phone, to police, to reporters? … It's hard to reconcile this perfectly planned crime with the Scott Peterson everyone's been exposed to."
Peterson's case is not expected to be as long as the prosecution's. Sources told ABC News that Geragos expected to finish his case within two or three weeks.
Geragos is expected to stress these main arguments: that someone else could have abducted and killed Laci; no physical evidence links his client to the killings; and Peterson's adulterous ways do not make him a murderer.
Under cross-examination by Geragos, Frey admitted that Peterson never told her that he loved her. In addition, jurors learned from Geragos' cross-examination of Grogan that Peterson had other affairs while married to Laci. These factors, the defense could argue, show that Peterson would not have killed Laci because of a desire to continue an affair.
"He [Peterson] looks bad. He sounds bad. He certainly didn't play the role of grieving husband," Cron said. 'That'll be the hard part for Geragos, getting jurors to put aside their dislike of Peterson and make a decision based on the law and not their emotions."