GRAND JUNCTION, Colo. -- The search for a missing mother and daughter has expanded to include neighborhoods around the Grand Junction home where they were last seen.

Investigators knocked on doors over the weekend to see if anyone had seen anything suspicious on Nov. 13, the day they disappeared.

Police are looking for clues in the disappearance of Jennifer Blagg, 34, and her 6-year-old daughter, Abby (pictured, left).

Michael Blagg, 38, said that he came home from work Tuesday and found a pool of blood on the bed in the master bedroom and his family missing.

Authorities said that he is not a suspect in his family's disappearanceThey also said they do not believe there is any threat to the public associated with the Blaggs' disappearance but would not explain why.

Investigators are waiting for lab work from the Colorado Bureau of Investigation on the blood found in the residence. They're hoping the type of blood and the analysis of blood splatters will tell them more about what happened inside the house.

"Probably the most key piece of crime scene evidence is a pool of blood," said Janet Prell, Mesa County sheriff's spokeswoman. "The hope is the analysis of that could give us an idea of what types of weapons, what kind of struggle was involved, who the victim could have been, and are there two victims."

The Mesa County sheriff's department has received many calls from the public regarding the case, many with their own theories of what happened to the couple. So far, none of the information has proved useful, said Prell.

Anyone with information about the case is asked to call the sheriff's department at (970) 244-3500 or Crime Stoppers of Mesa County at (970) 241-7867.