Limit - Eps 7-8

Now that all of the girl's back story are covered, their survival is turning less hopeful and more grim.  I should warn you there are Spoilers below.

Ep 7
So, midway through the series, it's starts to get interesting. Now, this survival story is turning into a murder mystery. The girls found Usui Chikage's (Masuda Yuka) dead body. Also, they found crazy Moriko at the scene of the crime. Obvioulsy, they all think that she killed Usui while fighting over a sickle. And, there's more evidence that Moriko has new blood stains on her clothes. However, Chieko doesn't want to jump to conclusions yet. She says that any one of them could of done this while they went searching for Usui.

But Haru is still very suspicious of Moriko. She doesn't feel safe with her around. So, they decide to take a vote whether or not to restrain Moriko. The majority voted not to restrain her. Then, the table turns when Moriko claims that it was Haru who killed Usui. She notices that Haru seems very desperate to get everyone to believe that it was Moriko who did it. While Moriko and Haru were fighting, Usui's panic button falls on the ground next to Haru.

Ep 8
 They decide that they should all search their belongings to see if there's any proof that one of them is a murderer. But as Haru empties her pockets and she finds what looks like a thermal pad where you stick it onto your skin. Chieko says that there are only six of those and she used one of them for Usui's injured ankle. Now, everyone suspects Haru to be the killer. But she gets angry and says that she didn't do anything. She runs off  and everyone goes after her. After they cornered her, she trips and takes a huge tumble down a slope. It's unknown whether she's still alive or not.

Whether or not Haru was the killer, there is still a chance that one of them could be it. So, Mizuki decides to confront Moriko alone. She wants to know the truth of what really happened and to start things over with her. She also gives Moriko permission to hit her. For her friends who bullied her. After throwing all her anger at Mizuki, she confessed that the blood on her clothes are hers due to self-inflicted injury. She didn't properly explain this to them because no one will believe her. But Mizuki believes that she did not kill Usui. 

Here comes the twist: after returning to the camp, Mizuki notices that there are only four thermal pads. But Cheiko said that there are six of those and she used only one on Usui. So, shouldn't there be five of those pads?  Did Chieko lied to them? Does that mean she's the one who killed Usui? 

Thoughts: I bet that Chieko used the fifth thermal pad to frame Haru. But wow, this completely took me off guard and I did not suspect it was her. She's a good Samaritan and a resourceful person. Plus, she has siblings that are waiting for her to come home. Why would she be killing anybody? This just seems out of character for her. But if she is the murderer, then Why!! Why would she kill Usui?! It doesn't make any sense.

On a brighter note, one of the teachers finally notices that they had the wrong location of the campsite. Hopefully, rescue will come soon before things gets worse for the survivors.