Cut offed head left in Machida

Have you heard the news about the cut offed head left in a park in Machida? I was very shocked because he park was near my friend's house, and I have passed there before. I also heard that the murderer who killed the person and cut off the body parts, used Odakyu line carrying the head. I use Odakyu line to come to school and to go home everyday so I was threaten. We here many murder news these days. Why is this, and aren't there any ways to improve the situation? Everybody is tired of hearing all this horible news but there are no sign for and end of this rage. We still get shocked by these news and I'm glad that atleast we still are not completely used to the terrible mureder cases.