@Tal45
I just don't think you can push someone in a river as a prank, that's not funny it's really dangerous and not something any of the teens I know would think was ok. Even a good swimmer could bang their head. I disagree and think this whole thing doesn't add up - why did he get ready to go in the water if he couldn't swim? Why would he go in alone? Or if there were others in there why didn't anyone help him? If you pushed someone in and saw they were in trouble wouldn't you try to help them? this should be looked into properly IMO, it all sounds like the handling of it has been a bit of a joke and the kids have had lots of time to concoct a story.
It was, and is, common among teens who are messing around near water that they push each other in. As someone who has spent much of his adult life doing voluntary work with teens, I have known many teens who did this (and, indeed, some young men).
You may think it doesn't add up but he was recovered wearing only swimming trunks and it is agreed they were his swimming trunks. I can't swim but I sometimes get ready to go in the water. No-one suggested he went in alone. He said he wanted to jump but those of his friends who knew he couldn't swim told him not to. The others did try to help him, as did the boy who pushed him in, but they weren't able to save him. It has been looked into properly and the police have sent a file to the CPS showing adequate evidence to mean that, if the boy who pushed Christopher was prosecuted, there is a good chance he would end up with a manslaughter conviction.
The police are very good at sniffing out concocted stories. It isn't too difficult. They tend to be too detailed and too consistent (i.e. the witnesses all say the same thing). There were 16 young people there. If this was a story, they would all have to agree, they would all have to stick to it and they would have to concoct something with sufficient variation from person to person to be convincing.
I would also point out that the purpose of a concocted story would be to hide the offence. If this was a concocted story (which I do not believe), it fails to hide the offence. The one thing you would want to cover up is that Christopher was pushed in, but witnesses agree that is what happened. That is common assault which resulted in Christopher's death, which therefore meets the definition of manslaughter.
You are, of course, entitled to the view that the boy who pushed Christopher into the water should be prosecuted. I, however, do not think it is a good idea to criminalise a 14-year-old for the kind of prank carried out by many boys of that age just because, on this occasion, the prank had tragic consequences. My view may change if more facts emerge but, on the information that has been published so far, I agree with the CPS that it is not in the public interest to prosecute.