Laci's Final Day

Laci Peterson spent last day seen alive preparing for Christmas

Witnesses have been giving details about the last time anyone saw Laci Peterson alive. They say the day before she disappeared in 2002, her activities appeared to be routine -- with Peterson going to the grocery store and a spa, and doing other things as she got ready to host Christmas dinner with her family.

Prosecutors have charged Scott Peterson with murdering his eight-months-pregnant wife on or around Christmas Eve day.

Details from prosecution witnesses are emerging the day after Peterson's defense attorney claimed that Laci Peterson's son was born alive -- disputing the prosecution's version of events.

Scott Peterson could face the death penalty or life without parole if convicted.