From three separate corners of the world, different races come together in an attempt to figure out just what caused an essential pony to disappear and who was responsible for making a hard-working pony abandon his post against his nature. A world renown detective easily dissects the situation and allows for his students to take a crack at it too before they all get the full picture.
Constructive Criticism is appreciated.
Thanks to Bad Horse for proof-reading this for me and pointing out some mistakes.
If you find any mistakes, something that doesn't make sense or something that doesn't fit, either PM me or leave a comment and I will fix/explain it as soon as I can. Sorry for the possible inconvenience :P
I really wasn't sure what tags to give this so if you could give me any suggestions that would be great.
Thanks to Bad Horse for reading through this and alerting me of all the mistakes.
Please read the description and if you find anything odd, either PM me or leave a comment and I'll get to it as fast as I can.
This was impressive...
685690 Thank you!
Hmm. Pony Sherlock Holmes (and griffon Mycroft)? Interesting.
Doctor Bell as a mentor to young Fetlock? Very interesting! Good nod to the real-life doctor who inspired the stories (as I'm sure I don't have to tell you, but enjoy saying anyway).
Fetlock as a contemporary to our own mane cast? Convenient. (I half expected him to contact Twilight Sparkle when he needed a unicorn's help...)
Intrigued to hear more about Bell's daughter, Merlin, and the mysterious forces that nopony wants to believe truly exist. (I take it Merlin is our Moriarty analogue, being Fetlock's age, a schemer, and decidedly opposed to the side of the angels.)
Minor critique, however... Verde is characterized as smart- she plans a fairly difficult-to-solve murder and how to frame her cousin for the deed, escape and finally kill herself in hope of thwarting the greater plan of which she is a part. At the same time, she fires six bullets from a gun in rapid succession and we are expected to believe that she expects to be able to fire a seventh without reloading. This doesn't exactly ring true. Perhaps it could be altered in some way, though- not all of the objectives on which she spends multiple bullets require them, and it would not be unreasonable for the detective inspector to have less than a full clip when she takes his gun- perhaps he had fired earlier that shift, or his shadowy superiors warned him that she might try something like this, in which case he might fire five bullets and be surprised by the lack of a sixth. Or perhaps it could be explained that six bullets per clip is not the norm in Equestrian weaponry, and the DI carries a less-than-standard clip size due to budget issues.
I'll have to investigate your other stories for more on the events mentioned but not explained here, I take it. Fine. Challenge accepted.
I'll be watching you.
686767 I am so happy to see your comment, and I love that you liked it
Very smart of you to see who I based the characters on, kudos to you. Merlin is indeed the Moriarty analogue but do you know who Seb is supposed to be? 
Also, you have a point about the bullet thing, but it's not the most pressing thing.
I have a week off school and I hope to write a the first few chapters of a multi-chapter fanfic that will explain this a bit more. If you want an even better understanding, I suggest you read the fics written by Shadowsca, here, so you can understand what I will be writing even better.
Finally, I actually told you who Bell's daughter is, but did you read it carefully?
686827
"did you read it carefully?"
Let's see...
Details left hanging:
* Dead pegasus. Lemon yellow mane. Green eyes.
* Fetlock mentions a "her" also with green eyes. (Named green-eyed mare contemporaries of the mane six: Junebug, Cherry Jubilee, Rose, Golden Harvest, Cheerilee, Caramel Apple, Apple Fritter, Daisy, Red Gala and... Applejack. Interesting. All earth ponies. My money's on Cheerilee, I suppose.)
* Fetlock has sisters with which he has trouble.
Potential hints about Bell's daughter:
* Bell is a zebra.
* Bell is an adult when the mane six are children.
* Bell is a doctor.
* Bell's daughter is confirmed as right by the sound of gunshots from Verde. The gunshots are the direct result of Seb's cooperation with Verde, so I'm inferring that Bell's daughter has guessed Seb's true alignment.
So those first two things pretty much eliminate all known possibilities but one. Assuming zebras don't interbreed with ponies, it has to be either Zecora or someone not mentioned in either this story or canon.
Now that I look... Seb's name, compared to a list of major Holmes characters, returns a notable match who also has shadowy superiors, has worked for the government, and is handy with a gun. Which is interesting, because I'd be rather surprised to see the Colonel taking orders from a foal...
687550 I am very, very impressed, You are certainly very keen and observant. The her with green eyes is in the list of ponies you mentioned, but sadly you were wrong about Cheerilee
Also the "her" doesn't refer to Bell's daughter, it just refers to a mare that Fetlock knows.
Secondly, your assumption that Zebras don't interbreed with ponies although accurate, was not what I was going for and that was probably why you overlooked one single line which tells you everything. If you want, I can PM it to you so you can think about it that way.
Lastly, very good catch on Seb and again, you are a very skilled person, and I'm impressed. Yes, Seb is taking orders from a foal, but I'm not copying the Holmes stories exactly (which is why I didn't tag this as a Crossover) and so I changed a few details.
Keep up the good work.
684495 Whew, took me a while to read. Pretty good. So you're about to start writing the rest? Good Luck with that, just don't screw it up. I didn't find any mistakes and everything seemed to be deduced correctly. I see that you still haven't had the Fics transferred yet. Shame. Maybe Knighty's just really busy.
Love how you used that scene from my fics, Derpy Hooves. Good work, but if you did that, then it means you are going to integrate it into the multi-chapter right? What's it going to be for? I can't imagine any use for it atm...
687550 This guy is such a boss. He's like a mini-Holmes being so observant and all. He even got the bit about Dr Joseph Bell
You really should join the group dedicated to Sherlockians on this site. Good luck finding it, shouldn't be too difficult.
689005 You'll see soon enough
Well, once I've written it you'll see.... Anyway, yeah Knighty hasn't gotten around to transferring them yet, and I do need them soon. I'm just going to wait a little bit then if he still hasn't done it, I'll just ask a mod to delete the originals and I'll re-submit them. It doesn't really matter how but as long as I get them onto this account. How long do you recommend I wait?
Also, yeah, he's good, shame he missed a line about Bell's daughter though, did you see it?
687550 On a separate note, Zebras and horses can infact mate to produce a zebroid. Though I'd let you know.
Also, I changed it so that Verde only shoots up once, so she only fires 5 bullets in total. 
689140 Yes, I saw it, and I don't know. Two weeks I guess? Things are only going to start getting busier for him, so time is running out.