Kevin Bergregor and his fraternal twin, Liz Arno lived in the jungles of Brazil at Medlab-05. There the began research for Jason Wynn on Heat-16 with plans to destroy the world and then rebuild it with their genetic knowledge to be perfect. When political tensions arouse, Jessica Priest was sent in to retrieve the weapon from the doctors' facility.
However, upon arriving, the doctors laid a trap where Jessica was imprisoned and prepared for genetic testing. Several of Jessica's squadmates, Obersmith and Zacks, where submitted to testing and turned into rapid regenerative hunters.
When Jessica escaped with the Heat-16, the doctors released the genetic creations to hunt her down and kill her. However, this backfired when Jessica traced the creatures back to the scientists where she murdered everyone in the facility.