Few of the One Piece series' assassins have left as lasting an impression as Rob Lucci and Kaku. The two assassins were elite agents of Cipher Pol 9 (CP9) and later Cipher Pol Aigis 0 (CP0 ...

Cipher Pol in One Piece is a secretive intelligence ... but their achievements may speak for themselves. They helped assist ...

and that is precisely when Lucci and the others made a call to Spandam, telling him that they will be back for revenge, which caused him to panic and send even more forces after the Cipher Pol.