Puzzle help

[Dev]

I have just found all of the puzzle pieces, but I'm missing one and I can't find it.
Here's a screenshot of the pieces i have:

http://steamcommunity.com/sharedfiles/filedetails/?id=890155184

If someone can tell me in which chapter i can find the last piece that will be very helpful

[Buffet Time]

the puzzle pieces are found in ever level in the first 4 Chapters from the leveles "The Metro" to "Showdown". There is an indicator on each level that shows if you got the puzzle piece of not.

[Skymirrh]

What he said, and if after determining for which level you're missing a piece and still can't find it, the wiki[hotlinemiami.wikia.com] can help!

[Mandrake]

You're missing an 'I', so you'll find the final piece in either chapter 6 (Clean Hit) or chapter 10 (Hot & Heavy). There's a small icon on the chapter selection screen which indicates whether or not the puzzle piece in the selected chapter has been collected. Have a look and replay the level which is missing this icon.