Do Not Ask by Elaine Williams Crockett

The President’s beautiful twin daughters disappear during a visit to a mysterious country estate known as Blackhall. A United States Supreme Court law clerk vanishes from her Georgetown apartment. Why are all these Washington, D.C., women disappearing? When the President’s daughters are found dead at Blackhall and the DNA is a trillion-to-one match to the estates owner, the FBI is certain the right person is locked up. But the killing isn’t over. Because Blackhall is a house with a secret. A centuries-old murder must be solved before the killer can ever be found, before another woman becomes the next to die.