A Head Found in Hiroshima can be hers?

A head was found on mountain in Hiroshima on Friday.
It is not yet clear whose head it is, but the police think there is a connection between the head and the disappearance of a 19-year-old college student, Miyako Hiraoka.
No one has seen her since Oct. 26th, after she had left from her part time job.
I don't understand that there are people who can do such crual things to others. Recently there are many murders that kill young women, which I think is very sad.
What I hate most of all is that man kill young woman because she refused to go out with him.
I think he is wrong. That is not her to blame but him. Usually men who do such a selfish thing are less attractive to women.