NOT acceptable and I never represented that I heard something about this particular case. But as an attorney for 30 years, I was able to offer some information about what often happens in these situations (that don't necessarily end in murder, but often in assault that doesn't end up in the papers). The something to hide is the sexual contact, even if it is relatively minor. The fear of consequence, of being 'told on' by the younger girl drives the panic. And we should acknowledge that science has demonstrated that the adolescent brain, especially the male, is not mature until far beyond the age of 15. Do we need to be reminded that 15-year-old boys frequently make less than wise or well-considered decisions?