The year was 1859. Four unsavory characters were serving as mercenaries for the Peruvian Army. A Spaniard (Diego Alvarez), an Irishman (Killorain), an Englishman (Luke Barrett) and an American (Brown). They figured there had to be a way to make better money and were looking for opportunities.

One of the men ran into a renegade priest named Father Matteo. The priest told the man of a treasure hidden and guarded at a church in the town of Pisco. The four came up with a plan, deserted from the army and made their way to Pisco.

Alvarez and Killorain were both Catholic and started to attend mass regularly. They became model parishioners. After some time they went to the local priests with a terrible story. They had found out that a renegade priest by the name of Father Matteo knew about the treasure and was gathering up a large group of bandits to come and steal the treasure.

http://theunexplainedmysteries.com/Treasure-of-Church-of-Pisco.html