Light didn't find the death note

Kiras vs Light(Lights and Skan plan)

But there was no Notebook.Light was surprised but still he started planning something else and then he got a idea,He thought of Contacting Near and Mello the successors of L but they were working in other though case so Light had to solve this case alone and started again to think why the notebook wasnt there.But here Skan was Laughing Inside because Skan came to knew aboout this as he had two plans If his wiretap planned failed.He had second plan.One day before Lights plan,At night he secretly attached a camera on the Shirt of Matsuda so he could read the notes.And after the notebook wasnt found he removed and destroyed the camera.Skan was laughing inside his room and was screaming "Ive won light  and then told that he has hidden the notebook in his police suit" but Light had installed Wiretaps in his room without telling anybody which made Light knew Skan is kira and he also had an Evidence