This is a September 1994 photograph of Luis Echeverria, who served as president of Mexico from 1970 to 1976. The legal battle to issue an arrest warrant against former President Luis Echeverria and other former officials for the deaths of protesters in 1971 suffered a setback as Mexico's Supreme Court rejected on Wednesday Feb. 23, 2004, one of the prosecutor's arguments: that Mexico's agreement in 2002 to cancel the statute of limitations for genocide should apply retroactively to earlier crimes. (AP Photo/Jose Luis Magana)