Man In The Glass

When Sherlock was six, the eldest of the Holme's boys-Leander Holmes-was violently killed. Sherlock pushed the happening aside and no one ever brought it up. As he is searching through his things, he finds some old sketches of what he believes killed his older brother, and he decids that maybe now would be a good time to find out exactly what happened. Johnlock/Maybe Mystrade/Maybe Some Sherlolly-one sided...