Get the Summary of Summary of Marcia Clark’s Trial by Ambush in 20 minutes. Barbara Graham was executed in 1955 for a murder she did not commit. She was born unwanted and then neglected. As she grew up, she fell into a life of petty crime. In 1953, the brutal murder of Mabel Monahan during a botched robbery thrust Barbara into the media spotlight. The press portrayed Barbara as a cold-blooded killer, and her trial was marred by prosecutorial misconduct...