Is there any logical way to solve these? Today I got 2, 5, 7 and 8. Judging by dialogues, two of the suspects didn't have an alibi (Berched and Tracy). And according to the calculator, the culprit is... Simon who isn't even suspected here.
You can disregard the text entirely. The NPCs that show up on the right-side of the screen are the ones with an alibi, whoever doesn't show up in that combination of logs is the one with no alibi.
So Simon is the one that doesn't show up in that combination.
Oh, that's how it works. Thanks for help.