attempted assault, sick/hurt Sam, teenchesters
Looking for a specific fic, pretty sure its on fanfic.net. Details that I remember are as follows;
John and Dean go on a hunt and leave Sam alone. Sam is walking home from school in the rain and gets offered a ride by a guy that did something at the school and also owned a store. Sam gets in the truck with him, and the guy starts feeling him up, attempts assault. Sam fights him off, the truck crashes. Sam gets out, and so does the guy. The guy gets hit by another car driven by a (drunk?) student who implies that he was assaulted by him as well. Sam is beat up and isn't doing great mentally. One of John's friends arrives to stay with Sam, Sam hides his injuries and doesn't tell him what happened. Dean got hurt and drives back with Caleb, arrives later than John. When John gets back Sam doesn't tell him what happened. John finds out eventually and Sam begs him not to tell Dean. Nearer the end there's a scene where Sam is down by a lake talking to a ghost boy, and helps set him free.