>>> news of public schoolteacher's christine fitsue's death spread quickly throughout the palo alto communityat fist, 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. >> the murder had to have occurred relatively close in proximity to this attempted resuscitation. if it happened 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 neighborhood. >> there was a lot of talk that this might have been the result of some burglary gone bad, that c