Police found many luxury cars parked at Barbara's home

In the time preceding the November 1957 meeting, trooper Croswell had Barbara's house under occasional surveillance. He had become aware that Barbara's son was reserving rooms in local hotels along with the delivery of a large quantity of meat from a local butcher to the Barbara home. That made Croswell suspicious, and he therefore decided to keep an eye on Barbara's house. When the state police found many luxury cars parked at Barbara's home they began taking down license plate numbers. Having found that many of these cars were registered to known criminals, state police reinforcements came to the scene and began to set up a roadblock.