This means that a person who is completely unaware that they are involved in a crime cannot be charged with conspiracy. For example, if two sisters agree to rob a bank and ask their brother to take her to the bank without informing him of their intention to commit a crime, he cannot be charged with conspiracy during the robbery. This specific requirement does not require everyone to know all the details of the crime or all the members of the conspiracy. As long as a person understands that the proposed act is criminal and continues, he or she can be charged with conspiracy. With respect to the actus reus requirement of conspiracy, a conspiracy is entered into under the Common Law as soon as an agreement is reached between one or more persons.