I think bleach does remove blood from some material/fabrics. both color and liquid would have some kind of reaction. I think if you use any kind of general cleaning kitchen or bath spray on a carpet, it would have a tendency to leave the carpet probably much cleaner and light in just those spots. Clorine Bleach would actually bleach it much lighter than the original color.That has pretty much been my experience with trying to maintain carpet. I'm not sure if there were more pets than just the cat, but even a young child walking around with drinks or snacks can cause spots and stains on carpet. I hate to jump to the conclusion that it was blood trying to be covered up when it may only be that Michelle scrubbed up heavy spills or spots, but if it was just done within hours of her disappearance, then police can determine if those spots were in fact freshly scrubbed and contain evidence of blood. They may know about it as the family said, but acting like they don't and not confirming so as not to give the POI or suspect any knowledge of what they do have prior to questioning. I still have a lot of questions. What was in the boxes that were being loaded up in M's car and why the need for all the blankets? The little one should have been riding in a car seat and it is not by any means cold enough in Odessa or West Texas requiring blankets. I wonder why the BF suddenly had no job at the PC place or if he even had a vehicle of his own? Doesn't sound like it to me.