How to continue Carlos's storyline? [Stuck]

[Derasght]

So, after unlocking everything in the power room, I gone through the chain of fragments up to the point of sending a "Search the portrait" Gabletter. After this, Carlos says that now he have to find out who was the Qs that attacked the C-Team ... After that he just leaves and I can't find neither next fragment, nor where I can go now.

I have all of the executions and all of the "melting others in acid" scenes, plus 3 of the endings (Sun, Crossbow and Biohazard) .

The only things left at this point are: All of the Force Quit Boxes, the final part of the VLR timeline ending, returning to Akane and Junpei (lock), the final part of the Stranded Pair (lock), who killed Mira (don't know the answer), Door of Truth password and the last ending of the 3-way standoff.
What should I do now?..

[sergamar23]

If you don't know who killed Mira , just let Eric know that you don't know by not answering

[Battler Ushiromiya]

You have to either type in "DONTKNOW" or let the timer run out on the "Who Killed Mira" question. That's all you need to do.

[Derasght]

This... is the stupidest thing EVER! How the hell are you supposed to guess something like that?..
Anyway, thanks a lot! It really helped!..

[sergamar23]

Originally posted by Derasght:

This... is the stupidest thing EVER! How the hell are you supposed to guess something like that?..
Anyway, thanks a lot! It really helped!..

Same, I typed all of the ♥♥♥♥♥♥♥ characters in the game, including Gab, before reaching the answer xD