If by "finding them together" you are referring to an exact spot in the room, then yes. Whenever one of my californian kings get out they tend to befriend any other escapies in a very special way.
If they were stolen, please post pictures of them on the site. Albino lavender retics are difficult to hide when they start to grow. Each has it's own unique color and pattern qnd thus you (or anyone seeing the pics) might be able to identify them should the guilty party decide to rather sell them than keeping them in his or her collection.