Undercover officers say the suspected wife killer discovered they were following him
Scott led police on a fast chase during the search for Laci, a witness testifies
A police dog's handler takes the stand and retraces the steps toward the end of a dock
Prosecutors aim to show that anchors could have been used to weigh down Laci's body
Scott Peterson's attorney Mark Geragos calls a police suspect list "stuff they invent"
Courtroom witnesses describe murder victim Laci Peterson on the last day they saw her