Cox joined a campaign in 2014 against a Phoenix, Arizona law which allows police to arrest anyone suspected of "manifesting prostitution", and which she feels targets transgender women of color, following the conviction of activist (and transgender woman of color) Monica Jones. Cox stated, "All over the country, trans women are targeted simply for being who they are. Laws like this manifestation law really support systematically the idea that girls like me, girls like me and Monica, are less than [others] in this country. " Later that year the Sylvia Rivera Law Project released a video in which Cox read a letter from transgender inmate Synthia China Blast, addressing common issues faced by trans inmates. But when Cox learned that Blast was found guilty of the 1993 rape and murder of 13-year-old Ebony Williams, she wrote on her Tumblr, "I was not aware of the charges for which she was convicted. If I had been aware of those charges, I would have never agreed to read the letter. "