[CS1Energypyre]

Sorry if I've missed some stuff, but I've looked everywhere and I can't find the answer to this:

Spoiler:

In the 4th episode of ni, when the police find the clock both the syringe and part of the text is missing. Who did this? It can't be Keiichi because if he realised what was going on before he killed himself he would of taken the part about Rena and Mion being murderers aswell, and I've also ruled out the vanmen (Tokyo, can't remember the proper name) because they wouldn't want anthing with a marker so they wouldn't take it.