The Beating Heart

MYSTERY-II ◇♧♤

Now the whole week police investigate on the Ji-woon's case and now it's our class turn police gonna ask us 4,5 questions everyone tells them about his behavior and that he is the bad boy of our school and on the last day he had a fight with Yora and then they call Yora for investigation and then they ask her what happened that day and she answered sir he is really stupid boy he confessed me that day and I rejected him that's why he started saying rubbish thing about me and my past and that it but I really fell sad for him and then she comes in her class and police even check the CCTV footage of that day but the last footage was the fight of Yora and him and after that not even the single footage was their because the weather is really bad that day and after that the case remains pending because the parents start complaining about the study's that it affect students studies so please stop it and it stops now the normal days of school begans but the news of children's murder is becoming viral now there are 5 children of same age near the park got killed by someone really badly their were 2 girl and 3 Boys no one can even find out either she's a girl or a boy they have so many scratches on their face, their mouth has been sealed and even the murderer pulled out their hairs and because of their clothes police get know that either she's a girl or a boy and on their stomach the murderer writes "I AM SORRY WE WONT DO THIS AGAIN ". Looks like the murderer want to hear this from the children and the killer kill them like he or she is killing a doll or a non living thing and after few days the police get to know that all 5 children's from the nearby society and this case not even finish and a new horrible news appears a boy also get killed but this time really horribly every single part of his body is cutted his face is full or scratches and scars every single part his eyes his hairs his nose everything this cutted into pieces no one can guess who is he but because of his phone the police informed his parents about him , but there is something similar in every case the killing pattern the killing patter is similar in every cases
But who ever it is not even a human it's a devil no one can't do such thing except a demon. And now the whole city is tensed for their children because of the murders happening in the city the school has been closed for few weeks .
What do you think guys ? Who is the killer who can do these types of murders ?