The Tesla Legacy Society was an organization dedicated to making the world a better place with the proper use of technology. One of the facilities is located in Panama, where many of the members allowed themselves to die and be brought back through the use of cryo chambers. Mantus was one of the founding members. Charles Johansson and Margaret Leonard met each other here.
At the most, the group had hundreds of members. After Charles Johansson joined the group the members were declining. Then Johansson wiped out the whole facility with the help of Big Jim Slade. No one was spared, and Slade personally killed Mantus's wife.