Why was Chile disqualified in the 1994 World Cup?

Answer 1

La Roja's most infamous moment known as The Roberto Rojas Scandal (also known in Chile as the "Maracanazo") occured on 3 September 1989. During a 1990 FIFA World Cup qualifying match at Rio de Janeiro's Maracana stadium, Brazil led Chile 1-0. A defeat for Chile would eliminate them from the tournament. At around the 67-minute mark, Chilean goalkeeper Roberto "Condor" Rojas fell to the pitch with an apparent injury to his forehead. A firework, thrown from the stands by a Brazilian fan named Rosemary de Mello, was smouldering about a yard away. After carrying Rojas off the pitch, the Chilean players and coaches refused to return claiming conditions were not safe. The match went unfinished.

After studying video footage of the match showing that the firework had not made contact with Rojas, FIFA awarded Brazil a 2-0 win (eliminating Chile from the 1990 World Cup). The team was banned from the qualifiers of the 1994 Football World Cup, and Rojas was banned for life (although an amnesty was granted in 2001).