Less than a week after sky-writing an apology for plagiarizing his 2012 short film “HowardCantour.com” from a Daniel Clowes’ comic, Shia LaBeouf went public again on Tuesday by tweeting a cease and desist letter from Clowes’ attorney in the latest bizarre twist in the actor’s ongoing copyright saga.

“Your client is seriously out of control,” the letter reads.

Addressed to LaBeouf’s attorney Brian G. Wolf, the comic book artist/writer’s rep claims: “We have been waiting since December 27th to hear how Mr. LaBeouf intends to make right, but all that has happened is further wrongful acts.”

While no official lawsuit has been filed (as of Tuesday evening), Clowes’ attorney, Michael Kump, suggests that LaBeouf has again violated his client’s rights in a series of recent tweets related to the incident. For instance, one of LaBeouf’s rants proclaimed a new short film was in the works that carried the same logline as another Clowes work, titled “Daniel Boring.”

“No analysis is needed to prove that Mr. LaBeouf’s most recent transgressions violate Mr. Clowes’ rights under the law,” Kump adds.

LaBeouf, who apologized several times to the comic-book writer last month on Twitter (“You have my apologies for offending you for thinking I was being serious instead of accurately realizing I was mocking you,” he wrote), has since peppered his messages with a tone of sarcasm and irony, posting words and famous apologies from other celebrities to his Twitter account including this one from Kanye West to pop star Taylor Swift:

Clowes’ lawyer is not amused.

“Leave Mr. Clowes alone and address these problems immediately,” Kump concludes in the letter, calling the actor’s New Years Day skywriting “foolishness.”

It’s unclear whether LaBeouf and Clowes will settle the case out of court but as of Tuesday, the actor, who next appears in Lars von Trier’s “Nymphomaniac,” continued to challenge the idea of plagiarism.

“We used to sit in a circle around a campfire and tell stories and share them and change them and own them together because they were ours,” he wrote. “Now our stories are owned for profit we buy corporate property and call it our culture enriching others as we deplete ourselves.”