An openly gay man fired from a global branding company—whose projects include the 2012 London Olympics—is suing his ex-employer for defamatory remarks about his sexual orientation, including calling him “HIV Boy,” the New York Daily News reports.

According to the article, Christopher Perez claims that his supervisor, Dean Crutchfield, dismissed him as a marketing manager at Wolff Olins last August after Perez complained about antigay comments made against him. The suit affirms that the company largely ignored the complaints.

“Mr. Crutchfield was the CEO's best friend, and [human resources] did nothing about Mr. Crutchfield's outrageous behavior,” the suit says.