Some people on 2ch speculate that the next victim is going to be Maeda Ami...
following the clues:
N
23K.24AB
hit on the left side of head (killer is right handed)
23K = 23 years old, team K -> Oshima yuko
and the next clue is
16A.33K
with left hand pinky finger bended
16 A = 16 years old (as of filming), team A -> Maeda Ami

testimony videos from some members are also released...
You will find something if you play it on reverse

btw, there will be 5 episodes, so there are still 3 more to go
