As an already established artist in the U.S. Mulleian was becoming controversial. Not only in his art surrounding his intense subject matter, but now on his views of homosexuality that drew the attention of the FBI to the front door of the artist's studio.

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In January 1973, The Advocate (a national newspaper in the U.S.) published one of the biggest feature stories on an individual of its day, which drew national attention and generated fan mail throughout the U.S. The cover story was two full pages dedicated to Mark Mulleian's art and lifestyle, and his views ranging from human rights and individual sexual expression, to the political aspects of journalism, such as the themes discussed in the writings of Thomas Albright, art critic of the San Francisco Chronicle. It was in the area of individual sexual expression that Mulleian's outspoken views drew the attention of the FBI to the front door of the artist's studio in an investigation into his controversial and challenging commentary of aspects of fundamental social values, Mulleian reveals that he is a homosexual.
Despite the artist's outspoken observations of the national scene, his media attention continued to climb for over three decades, not only in mainstream media but also in the media of a newly emerging counterculture that was finding its voice in what would later come to be thought of as a bridge between the sensibilities of North Beach and the dawning of a new age of personal expression and sexual freedom. He was thought by many to be ahead of his time. Mulleian's art and his avant-garde views created a unique relationship with the media of two cultures, a relationship that was not only unprecedented but, indirectly, a testimony to the universality of his work.
An artist comes out
on a international scale
ADVOCATE 1973
Two weeks after the Advocate story broke, a similar two-page cover feature would appear in the European equivalent of the Advocate, the German magazine Him, a monthly periodical reaching a wide audience in Belgium, Denmark, England, Italy, the Netherlands, Austria, Switzerland, Luxembourg and the United States. Mulleian was twenty-three years old.