El Muerto was first published in a comic book titled , `` Daze of the Dead : The Numero Uno Edition '' at the 1998 Alternative Press Expo in San Diego , California . The character made his first appearance in a xeroxed black and white preview comic titled Daze of the Dead : The Numero Uno Edition ( Feb. 1998 ) . El Muerto 's first public appearance was in 1998 at the Alternative Press Expo in San Jose , CA .