MADRID, Spain -- Spain's state prosecutors could seek retroactive punishment against those who broke national laws from their involvement in the Lance Armstrong doping scandal, according to the country's anti-doping agency.

The AEA said Thursday it handed the USADA dossier over to prosecutors to investigate whether charges should be invoked for crimes committed on Spanish soil.

Spanish doctors Luis Garcia del Moral and Pedro Celaya, and trainer Pepe Marti are alleged to have been key figures in "the most sophisticated, professionalized and successful doping program that sport has ever seen."

The doping ring allegedly helped Armstrong win seven Tour de France titles from 1999-2005 for U.S. Postal Service and Discovery Channel. Former team principal Johan Bruyneel was a Spanish resident at the time.

The alleged doping ring spanned from the mid-1990s through 2010. Doping was not considered a crime in Spain until legislation was passed in 2006, which means any illegal actions before then would have to be charged as endangering public health.

Spain, however, has been slow in bringing doping cases to court with May 2006's Operation Puerto investigation finally set to go to court at the beginning of the new year.

The U.S. Anti-Doping Agency has banned Armstrong for life and said he should be stripped of his seven Tour titles.

On Wednesday, Armstrong was dumped by Nike, Anheuser-Busch and other sponsors and he gave up the top spot at Livestrong, his cancer-fighting charity.