Justin as a ghost

[am3lee]

A request yesterday remind me of this story. Justin died years ago (he's murdered) but his spirit trapped inside his house (which mean he's actually older than Brian). One day Brian's car broke down and he saw Justin at the house. He borrowed Justin phone. At least that what I remember. Oh,I think the killer is Stockwell? And Brian make some investigation about Justin death. It looks like a death fic but turn outs it's not. It has a happy ending.
Thank you :-)

FOUND it!
The story is A Haunting Affair. Link in comments.