wires. there was a knocked over bird bath. so there was evidence outside that at first you need to think to yourself, i think that this might be a burglary. >> and karen's overturned purse on the stovetop supported the break-in theory. anna cox took an inventory of everything at the crime scene. a pizza box, a garden glove, a grocery receipt, all routine findings so far. but it's what authorities spotted on the wall above the body that would turn this case into something out of the movies. three-letter message in blood. you didn't have to squint to make it out, either, roc. on the victim, karen's right hand index finger was clearly stained with blood. roc. what was the murdered woman trying to tell the cops? >> all these theories were running through my mind. what does that mean? is that a word, is that a