When he almost drowned he heard cars pasting by and he ran up on the highway and stood in front of a truck to get it to stop. Then he had the people inside help him. Then when they could not find him they said that he should call the police and tell Tony's parents. Joel promised that he would and started riding his bike home.
This happens after Joel gets home and one his way home he had thought of a lot of lies to tell everyone. Except Joel had told everyone else a different lie instead of the one that he had carefully planned in his head. This picture happens when Mrs.Zabrinsky is asking where Tony is and he tells the different lie.
So this picture is from when Joel goes into his room and he smells the river. After he takes multipul showers he can still smell it and the smell will not go away. To everyone else he smells fine but he smells the smell because he feels guilty about what had happened to Tony.
So this is when Joel confesses everything because the police started asking him some questions and is father said that Joel would not lie because he is honorable when he said that word that was when he broke down and told them. By the way Tony's father passed out when he heard the news.
This is after everyone finds out about what had happened. Joel is htinking that it should have been him to die and his father comes in and apoligizes to Joel for not realizing that he should have said no. Also his dad tells him that it was not is fault.