and they'd better not kill him because they need a confession
He's killed at least two people tonight, I don't know why getting a confession would be better then him getting killed.
we want to know why he did all this
You may want to, I honestly don't care why they did it.
The fact that these two suspects aren't turning themselves in or confessing, means they know they are guilty or have guilt SOMEHOW; meaning its likely they did this.