NCIS" last week. Apparently there was some tension behind-the-scenes, leading to her decision to quit.

Perrette first took to Twitter to combat some tabloid stories she claimed were false and the work of a "machine" trying to keep her silent about "multiple physical assaults." Her comments were vague, but she seemed to be alleging physical assault on the set of the CBS show. CBS responded to her tweets with a statement -- confirming she approached them "with a workplace concern" more than a year ago -- and Perrette then responded again through Twitter to thank the network for having her back.

It's all still confusing without context on what happened, but here's the chain of tweets and statements:

He did it? Who did what? Fans have been speculating, but we may never know for sure, unless she decides to share.

CBS followed the tweets with this statement (via Deadline):

"Pauley Perrette had a terrific run on NCIS and we are all going to miss her. Over a year ago, Pauley came to us with a workplace concern. We took the matter seriously and worked with her to find a resolution. We are committed to a safe work environment on all our shows."

Then the Abby actress returned to Twitter with this note of thanks:

Fans are naturally curious about what's going on. But this may be where the mystery ends, unless Pauley feels like speaking out further.

Want more stuff like this? Like us on Facebook.