Muriel Walker

Muriel Walker is a minor antagonist of White House Down. She is the widow of Martin, the corrupted head of Presidential Detail. She was portrayed by Barbara Williams.

Biography
Muriel is first seen when her husband is seen getting ready for work on the fateful day the White House is taken over by terrorists. He is seen loading his Beretta 92FS pistol and removing his American flag pin and placing it next to a picture of their late son, Kevin. He tells Muriel that he will be working late tonight, tells her that he loves her and leaves without another word. It is later revealed that Martin himself is working with their terrorists, who are just mercenaries led by Emil Stenz, to hold President James Sawyer hostage and destroy his peace treaty. Muriel is later brought in by Special Agent Carol Finnerty to try and talk some sense into her husband over the phone, but she suddenly reveals that she knew about the plot all along, as she has been extremely upset over Kevin's death during a failed mission in Iran. Rather than try and get her husband to stop, she tells him to avenge the death of their son. Muriel is then taken away into police custody. She presumably spends the rest of her life in a federal prison for her role in the takeover of the White House, as Carol Finnerty promised she would.