Foul Play Said to Be Involved in Washington DC Mansion Fire

Investigators say the fire that killed a wealthy couple, their son and the housekeeper was intentionally set.
2:32 | 05/16/15

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Transcript for Foul Play Said to Be Involved in Washington DC Mansion Fire
That's where Oklahoma City Bo bomber timothy Mcveigh was put to death. A mysterious marng fire in a wealthy neighborhood. A couple, their 10-year-old son and a housekeeper all killed in a blaze that investigators now say was set. More on the quadruple murder and the mysterious text. Reporter: Gruesome new details emerge in the quadruple homicide in one of the most affluent neighborhoods in the country. Just down the street from the vice president's official residen residence. Four victims. Reporter: Authorities are calling this fire suspicion. We can say that there were at least on three of the four victims, there were injuries discovered. Appear to be blunt force or sharp object injuries. Reporter: According to investigators, no science of forced entry at the burning home where they discovered the bodies of savvas savopolus and his wife, Amy. Police believe the couple's 10-year-old son and the housekeeper were among the victims. I have never seen anything like this. It's incredible. Everyone in the neighborhood is shaken up. They're not sure what to think. It's really kind of, just rattling. Reporter: Officials poring over potential clues at the crime scene. This morning, the focus now, the family's blue 2008 Porsche. Found burned and abandoned in this church parking lot. We're asking anybody who may have seen the car between Wednesday the 13th and third around 5:00 P.M. Reporter: And now, a woman who claims to be their second housekeeper speaking to our Washington, D.C., station, telling WJLA she received this mysterious text from Amy savvopolous telling her not the come to work. Want to make sure you do not come today. Reporter: Police say the motive is still unclear. They're hoping the surveillance cameras can lead to clues in this shocking crime. Today the investigation continues. Police going through video frame by frame to try to figure out what happened inside this house. They are asking the public for help. Police say they are investigating this as a homicide and not a murder-suicide. Dan? Paula? Gloria, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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