Florida Teens video tape disabled man drowning

Ch
I don't know if anyone else has seen the news, but there was a group of teens near a retention pond who watched a disabled man wander into the water and then video taped and mocked him while he drowned. They yelled things like "get out the water, you gonna die" and "ain't nobody fixing to help you, you dumb". No one called for help or even attempted to save this man. After he stopped moving, they laughed and said "oh, he just died".... they posted this video online and it took authorities 3 days to find his body.
These teens are not being charged with anything because they didn't break any laws. They were interviewed by police and showed no remorse, they still found it funnny.
Do you think they should be charged with something? 
(Not to mention a video just went viral of a dog saving a drowning baby deer, but humans can't be bothered to try and save another human life)