sentences:  By the 1990s looting had been much reduced by the nearby presence of several guerrilla detachments during the later stages of the Guatemalan Civil War.Tamarindito was first mapped in 1984 by Ian Graham, Merle Greene and Stephen D. Houston, who also uncovered some monuments at the site, including Hieroglyphic Stairway 3.The Petexbatún Regional Archaeological Project started investigations at Tamarindito in 1990, carrying out mapping and test excavations under the direction of Stephen D. Houston and Oswaldo Chinchilla.