Can't delete files from Trash
The quick and dirty way to trash a folder is to move another folder with the same name into the existing folder. It looks like you have a folder t which might be amenable to making a new folder on the data drive and name it identically to the folder you wish to nuke and then trashing the "new" t folder.

If that doesn't work, you should be able to open a finder window and attempt to rename the problematic file. See http://support.apple.com/en-us/HT201583 for details.

Lastly, if nothing works, consider posting what format the /Volumes/DATA is via diskutil list and sudo ls -laOR /Volumes/DATA/.Trashes/