
Even if that is the case, isn't Shelmeo said each artifact leave record of how they used even if it got deleted? that's how he found out about how Stravin is killed and the time lined up so why don't they add that. I don't know, so far everything is indirect evidence, like I said if this is modern era with good lawyer they can't convict the Empress, but well since it's ancient times maybe you can be found guilty just from testimony alone, no wonder it's easy to framed someone in the past.

Yeah, he said the artifacts leave a record of when they were used which lines up with the time of the murder and the attempt on Satiana.
The artifacts were in the murderer's hand (on his person) so he's the killer.
The testimony puts him at the palace in the Empress' quarters before the murder.
And the testimonies of Leofred (as he saw the recording) and the murderer can be enough to accuse the Empress of being the mastermind.
If they really wanted another testimony, they could have added Lady Steina as she also has seen the recording. Sure enough, without the recording it's mostly circumstancial.
Since the Emperor is also against the Empress, and he has enough circumstancial evidence to lock her up pending further investigation... which is where the chapter ended.
She isn't fully convicted yet. They lack hard evidence. But when enough people speak out against you, it's enough especially if the one judging you (the Emperor) also isn't on your side.
I mean, why they complicated things with all these witness, just played the record, it's contain video and audio. If these modern era, the Empress can't be sentenced with testimony alone.