Paranormal investigators as what they fondly call themselves have three main reasons why they go out and “hunt ghosts” in known hunted locations.
1. To prove the existence of ghosts and spirits
2. To help the spirit to cross the other dimension
3. To cleanse a hunted place with paganistic rituals.
The paranormal investigators assumed without any iota of evidence that a soul can still wander on earth after dying. A frequent reason why a soul failed to cross or go to the other dimension is that the soul still has some unfinished business on earth or that the soul do not know that he is already dead.
This belief in wandering souls can be traced back into the times of paganism wherein, as warned by St. Augustine in his book The Mystical City of God, that these wandering souls are devils disguising themselves to be lost in order to gain sympathy, recognition and importance. Henceforth, the rituals offered to these wandering souls are nothing but false pagan/demon worship.
The Catholic Church strictly prohibits the faithful to communicate with the dead, either by using mediums or through their own effort.
“All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to “unveil” the future. Consulting horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums all conceal a desire for power over time, history, and, in the last analysis, other human beings, as well as a wish to conciliate hidden powers. They contradict the honor, respect, and loving fear that we owe to God alone…” (CCC, 2116).
We are told that at the moment that a person dies he is judge by God (Particular judgement; Heb.9:27) and would immediately know if he is going to either heaven, hell or purgatory. In light of this fact there is no truth in the belief that souls can still wander on earth after death. If this is the case how can we explain the paranormal experiences of the people? As what have St. Augustine said these are demons pretending to be lost souls.
As Catholics we should not make any attempt to contact the dead either by using mediums or on our own effort.