Check for key words such as therefore, hence, yet, etc. Look in key locations such as the beginning and end. Compare what you think is the conclusion to what we know is not the conclusion. Conclusions are never examples, statistics, definitions, background information or evidence. A conclusion should provide an answer to the issue as I stated above.
Effective writers make their conclusion clear by placing it at the beginning or end of their papers.
I'm with everyone else, hoping against hope that these two boys didn't do it. I'm also with those who point out the physical difficulty of such an act for two small boys, and I wonder about the propriety of lengthy police questioning of such young suspects without their parents present. The law, I'm told, doesn't require that, but I wonder about that law, too. Whether those boys are guilty or innocent, though, the one thing we ought to know is that children that age know right from wrong, especially when it comes to cracking someone's skull with a rock, dragging her into the weeds, suffocating and sexually assaulting her. Most of us can remember that age, struggling with our consciences over lying, filching and battling with siblings.