‘X’, ‘Y’ and ‘Z’ entered into conspiracy on December 26, 2017 to explode a bridge. In accordance with the conspiracy, the bridge was to be exploded on January 26, 2018. However, Mr. Y was arrested on January 24, 2018. He made statement to police about the conspiracy. However, remaining two conspirators successfully executed the conspiracy. Later on, the remaining two conspirators were also arrested, and all were charged under various provisions of Indian Penal Code, 1860. 

 During trial, prosecution reasonably established the fact of conspiracy between X, Y and Z to explode the said bridge. In this reference, which of the following fact is relevant under Section 10 of Evidence Act 1872?