10. A method for detecting a three-way call in a monitored telephone conversation, the method comprising: extracting at least one characteristic of the monitored telephone conversation; storing a representation of the monitored telephone conversation in correspondence with the extracted at least one characteristic; analyzing the at least one characteristic of the monitored telephone conversation so as to detect a presence or absence of the three-way call in the monitored telephone conversation; determining a starting point of the three-way call in the monitored telephone conversation; and storing the determined starting point in correspondence with the representation of the monitored telephone conversation.
10. A method for detecting a three-way call in a monitored telephone conversation, the method comprising: extracting at least one characteristic of the monitored telephone conversation; storing a representation of the monitored telephone conversation in correspondence with the extracted at least one characteristic; analyzing the at least one characteristic of the monitored telephone conversation so as to detect a presence or absence of the three-way call in the monitored telephone conversation; determining a starting point of the three-way call in the monitored telephone conversation; and storing the determined starting point in correspondence with the representation of the monitored telephone conversation. 15. The system of claim 10 , further comprising calculating a score of the monitored telephone conversation based on the analysis, the score being indicative of a likelihood that the three-way call occurred during the monitored telephone conversation.