What Causes Polter Geists?

Could it have been a spirit? It could have been, but we don't have good evidence for that. On the other hand, we have two young men on the scene, the about 15 and 18 year old prentices. And that fits the common profile of a living agent case of r s p k. In some cases, there may be a spirit involv ved, but in other cases, the recurrent spontaneous psychocanesis may be involved.