[3] A-One joined Rammellzee's graffiti crew Tag Master Killers, which also consisted of Delta2, Kool Koor, and Toxic.
In 1982, A-One, Toxic, and Kool Koor participated in the group show Camouflaged Panzerism at Fashion Moda in South Bronx.
[2] His work was featured in the exhibition Writing the Future: Basquiat and the Hip-Hop Generation at the Museum of Fine Arts, Boston from October 2020 to July 2021.
[2] He later moved to Paris, where he continued to work until his death from a brain hemorrhage at the age of 37 on November 11, 2001.
[3] He is survived by his older brother Octavius "Ocky" Clark, a 1991 Pan American Games gold medalist.