A Theft at Sugar Cube Corner!

We have a mystery on our hooves everypony! Someone has stolen the cake's treats! I need you to solve it!
Mr. cake says he was helping scootaloo when he heard a crash when Apple Bloom knocked a cupcake off a table. He claims he went to help her. When he returned everything was gone!

As soon as he walked away a blue pegasus flew in here and smashed the glass, grabbing everything they could reach!

I came down stairs when I heard Mr. cake shout in surprise!

I was jus' eatin' ah' cupcake and ah' accidently knocked it off the table, Mr. Cake came to help me, then somepony must have come in an' takin the food!

well we have the story know lets take the next step! You know what we need to do Pinkie?

LOOK FOR CLUES!

That's right! Get to it!

_____________

Note me when you solve it in order to win!

Rules:
1. Anypony is a suspect: In or out of the picture. It can also be a more then one pony.
2. In order to win you must meet three requirments
-Name the culprit
-Give a motive
-Present at least one relevant clue (But you may need more in order to make a case, or you may not) and say why (Just a simple explanation is needed) they point to your suspect.
3. In order to win you must tell me the answer through a note. Not a comment. (Of course I'd still love to get comments on it. Just not the answer! )

Note: there is no hidden code in this one. Just a mystery.

Note 2: You may need to download this to see all the clues properly. I'm not sure whether or not you'll be able to see them directly on DA.

The mystery has BEEN solved

It was solved by master detective:

There are a total of 8 clues.

_____________

_____________ANSWER DON'T READ IF YOU WANT TO SOLVE IT_____________

-The thieves were the CMC
-Their motive was (as with many things) to get their cutie marks. This could be done through either winning the candy competition mentioned on the wall or through the crime itself.
-Evidence:
1. AB distracted Mr. cake perfectly and is now excitedly checking herself for a cutie mark.
2. The blue feather on the ground matches one Scootaloo has in her bag (she has them as she is RD's biggest fan)
3. The cupcake on the top shelf counters Scootaloo's claim a blue pegasus took everything in reach. Only a young filly who couldn't fly wouldn't be able to grab it.
4. Behind Scootaloo's hoof is a torn piece of a CMC cape, cut by the broken glass. This cape may also indicate Sweetie Belle's involvement as she she may have worn it and then made of with the goods.

-There is no evidence linking PP
-Rd is not likely due to the cupcake remaining on the top shelf and the fact she already has an order in, so why steal?

Note 3: The winner's answer was allowed to deviate from this if it was reasonably close and fully backed up in my opinion by evidence.

_____________ANSWER ABOVE DON'T READ IF YOU WANT TO SOLVE IT_____________

This is the first mystery piece that I'm uploading, I hope someone has fun solving it.

It should be pretty easy I think!

Like my code pieces the first one to fully solve the mystery will win a prize as detailed here: [link]

If you want any of the individual parts of this (ie. just background) tell me and I'll see what I can do.

Just Pinkie: [link]

You're welcome to use this for whatever you want as long as you give credit! (And I'd love a link to your work to see what you came up with!)

If you see any problems please tell me and I'll hopefully be able to improve!

svg: [link]