I searched for a long time and only found a couple of clues related to Tieru.

I'm currently trying to systematically organize all the clues and the people they relate to, using a notebook and pencil, and then put it all together in two nights. Afterwards, if I have time, I'll publish the most obvious candidates; for now, I'll just write about Ple-Sena.
For the first night, the clue is a cloak (or rather, one of the clues, as I think, maybe it's additional). The cloak is more significant than the dirt because it was directly on the killer.
For the second night, the clue is "fade" or "sudden attack." I'll explain: the event is shocking, meaning unexpected. Therefore, the attack on the TV studio itself was unexpected (or, in this case, sudden).
Then, as an additional clue, they could have taken a statement that connects to Ple-Sena, such as "Wraaah, you stupid kids, haven't you died yet?!" - i.e., with the same dismissive meaning.
I published this version because it's complete, even though I don't entirely like it. Nevertheless, if we also take into account Ple-Sena's strong desire to "hang" me, then it's quite possible that this is how it all happened.