1) The specific story: It dealt with Sam finding out that that Dean was abused/neglected as a child by John - notably that their dad once locked him in a closet or a wardrobe for a long time. I think he was drunk or sad about Mary. Sam was utterly horrified - I don't think it was wincest though, just brotherly love. It's not much to go on but it's really playing on my mind. (FOUND - link in comments)
2) A more general search: Sam and Dean as adults, or close enough, and Sam finding out that Dean was mistreated as a child. Anything from full out abuse to just neglect (by John). I want him to be really angry and protective; making Dean understand that what John did was wrong. I'd prefer brotherhood to wincest but anything along those lines is great.
3) Also any fics where dean is deaf or blind and mistreated by John because of this.

One of my favourite stories, but my tablet just died, and with it my AO3 bookmarks... plus my memory apparently, because I can't remember the name.
Dean needs an english credit, but has a crazy schedule - Cas is a professor of Shakespeare and is willing to meet with him outside of class hours. He's super busy, 3 jobs, driving Sam to Kansas city everyday for private school...they live with John, initially, but he's a huge drunk and does something reckless, eventually they end up at Cas' house.
One detail is that Gabriel, Michael, and Lucifer visit for Christmas.
There are more details I could give, but I don't want to ruin it for anyone who's interested, and I think that's enough to go on if you know the story.
Any help would be lovely, I've never posted here before, so I hope the tags are okay...
FOUND! 300 Things, in comments. Thanks!
So Dean left for college and now has his own apartment (couldn't tell you if it was Stanford or not) and one day out of the blue, a Sam shows up at his door. Sam is still a teen is this story. Sam looks kind of beat up and has some sort of psychic protection around him. Apparently while Dean was gone, Sam developed a bunch of powers. Not sure what the problem was but Sam had to go to Dean for help.
I know this is vague but if anyone has a clue what I'm talking about, please help!
I found it here it's called Can I Call in Dead if anyone else is interested =]
1.Mafiaboss Dean/Jensen-jealous/possessive
2. Hooker Sam/Dean
J2 and wincest is great. No destiel please. I did read a fic called Blood Brothers where MafiaDean was hunting Sam down for running away to Stanford and away from the "family business".Police agents was trying to get Sam to betray that family. Just to let you know that I read that fic already.
Blood brothers:
http://www.sinful-desire.org/archive/viewstory.php?sid=4248&warning=5
Thanks.