Google Docs are stored on Google's servers. Computing Services does not have access to recover the files. Here is Google's Find or Recover a File Instructions.
If you can no longer see a document that someone else created and shared with you, please try the following:
The creator of the document should unshare it with the person who cannot see it.
Close the document.
Reopen the document.
Reshare it with the user that couldn't see the document.
Alternatively,
Click the advanced search options next to the blue search button on top of the documents listing.
Try clicking on the "All Documents" or "Shared with Me" and see if the document shows up.
NOTE: If one accidently deleted/moved an item to the trash, they will have 30 days to remove the items from the trash before the file is deleted forever.
If you have any questions or concerns about recovering a Google document feel free to contact Computing Services:
719-587-7741
Randall Smith would likely be included in trying to troubleshoot this issue.