https://www.theguardian.com/technology/2018/jul/21/farting-unicorn-row-artist-reaches-settlement-with-elon-musk

Tom Edwards from Colorado, who challenged Musk’s use of motif without attribution, reaches agreement with Tesla tycoon

A Colorado artist says he has reached a settlement with Elon Musk after challenging the Tesla tycoon’s use of a farting unicorn motif that he had drawn as an ironic tribute to electric cars.