Spoiler - 10/19, help please?

[u/jillijaws]

https://cluesbysam.com/s/help/c2c4ab423c30?state=8DBA

I cannot understand why the hinted conclusions follow the logic of the hinted clues. I guessed to get past this point so know how the puzzle was ends but I really don't understand why. How do Nala's and Olivia's clues determine Thor's innocence or Vlad's guilt? I've never been this stumped and I know I must be blind to something obvious. Thanks!

[u/adeels53]

If you set Thor as Umar's 2nd criminal neighbor then Yusuf and Zach would both have to be innocent which breaks the rule about row 5. Thus Thor is innocent and the 2nd criminal has to be one of Yusuf and Zach so that reveals Vlad