isn't biotene, for people who suffer from a dry mouth. >>> news of public schoolteacher's christine fitzhugh'seath spread quickly throughout the palo alto community. at first, christine's death appeared to be an accident, but when the medical examiner found evidence consistent with a homicide, investigators took over the scene. >> there were forensic teams going in and out of the house for days on end, and we kept asking the police how much longer is this going to go on? >> investigators believed that christine was murdered sometime between 12:20 p.m. and 1:40 p.m. >> we were able to get the receipts, so we knew that, you know, at 12:20ish that she was alive and buying coffee at a local coffee house. >> christine's husband and two co-workers found her body and called 911 at 1:40 p.m. >> call 911! >> the murder had to have occurred relatively close in proximity to this attempted resuscitation. because if it had occurred several hours earlier, you're going to get a lot of coagulation of that blood. >> six months before christine's murder, there had been six home burglaries in the fitzhughs' neig

. ♪ >>> music played an integral part in the lives of ken fitzhugh and his wife, christine. he