In order for conspiracy to be present, some form of agreement between the two parties is required. Bob does not need to verbally tell Suzy that they are planning to rob the bank together in order for it to be considered conspiracy. If Bob and Suzy take any steps toward completing the robbery, it will be considered an agreement to commit a crime. For example, if the court can find instances where Bob and Suzy's negotiated plans at a meeting, or made similar transactions, that would be considered a nonverbal agreement to conspire. The court does need evidence to prove that both parties were involved or were aware that an agreement between them had been made.