It was occupied for some 1,800 years, and is particularly noted as one of the southeasternmost sites of the Late Classic Cotzumalhuapa culture which extended over much of the Pacific drainage of Guatemala and included part of the Salvadoran departments of Ahuachapán and Sonsonate.
Over the Preclassic, it was closely affiliated with Chalchuapa and other early Maya sites in the territory of western El Salvador, as attested by the presence of the Lamatepeque, Jicalapa, Pinos, Izalco, Santa Tecla and other ceramic groups.
The site was resettled a few decades later, perhaps around 600 AD, but the material culture of its new occupants represented a complete break with its Maya past, identifying it as a Cotzumalhuapa settlement.
Cotzumalhuapan monumental architecture is commonly faced with field stone, and at Cara Sucia, large river cobbles were used, selected to be of similar size.
In consideration of the local variants in the material culture of Cara Sucia in regard to the central Cotzumalhuapa area, a distinct Late Classic phase was defined for the site: Tamasha.
In addition to some small settlements with Tamasha occupation, two other affiliated monumental centers are presently known in El Salvador, La Danta (on the border with Guatemala) and Huiscoyolate (next to Izalco).
The Cotzumalhuapa culture is noted for its portable sculptures related with the ballgame, especially yokes and hachas, both of which have been found at Cara Sucia, La Danta, and Huiscoyolate.
Taking advantage of this vacuum of authority, hundreds of local residents began to loot Cara Sucia on a daily basis, eventually digging over 5,000 pits.
Amaroli undertook further work at Cara Sucia in 1986, establishing that its relationship with the Cotzumalhuapa culture was not only in regard to its sculptures but also in its shared architecture and ceramics, findings which were summarized by Rafael Cobos.