Pacheco was born December 26, 1800, in New Switzerland on the plantation of Francis Philip Fatio Sr.—an associate and possibly a partner in Panton, Leslie, & Company.
[1] Pacheco's father Adam was a skilled slave working a lot with his hands as a carpenter, building boats, and driver.
This is where he developed his skill for learning multiple languages, and by the time he reached adulthood, he was proficient in French, Spanish, and English.
[5] Luis would frequently leave the Fatio plantation to visit his wife, often getting into trouble for not informing his master of his whereabouts.
Following Antonio Pacheco's death, his wife loaned Luis out to the military to serve as an interpreter for the Seminole Indians.
According to the Seminole leader Alligator, the Dade battle began at 10:00 a.m., but according to survivor Private Ransom Clark, it started at 8 a.m. and ended around 4 p.m., with the Indians leaving around sunset.
[8] Of the three U.S. soldiers who survived, Louis Fatio Pacheco was suspected of being an informant and spent the rest of his life trying to clear his name.
In 1845 Marcellus Duval and his brother attempted to obtain all of the Black Seminoles set free in New Orleans, including Luis Fatio Pacheco.