It has been proven, using conventional science, that when our bodies experience trauma, we release energy.  Because energy cannot be created nor destroyed, only changed from one form to another, we as investigators search for that energy

Spirit energy may manifest in several different forms, the most popular of which are orbs, ectoplasm, and apparitions. 

Orbs are balls of light and represent the weakest manifestation of spirit energy.  Many contend that orbs are reflections of a camera shutter on a photo, or dust, rain, or even insects.  Yet photos taken in complete dark and with no flash using technology that capture light in the infrared spectrum capture orbs...  Colored orbs are also seen and are thought to reflect energy from strong emotions.

Ectoplasm looks like smoke or steam and is a free floating mist-like manifestation of spirit energy seen when an entity is trying to gather enough energy to show him or her self.

Apparitons may be full or partial body in form and appear as human in some way.  Crisis apparitions may appear to warn family members or close friends of potential danger or to convey a message.  An example of a crisis apparition would be seeing your grandfather at your bedside during the night and having him tell you he loves you, only to find out the next moring that he passed on during the night at the same time you woke to his presence!

Residual hauntings are not intelligent hauntings.  They can most easily be described as similar to an old film loop that plays over and over and over again.  Entities in a residual haunting do not interact with people or the environment.  If you have ever heard of people seeing battles at Gettysburg play out right before their eyes you have heard the story of someone who witnessed a residual haunting.

Although the word poltergeist means "noisy ghosts" poltergeist activity is triggered by a living person and utilizes psychokinetic energy.  The typical poltergeist involves an adolescent female who does not consciously cause or direct the activity.  Stress is often the trigger for the energy release and counseling is sought to resolve the issue.

The term demon comes from the Latin word "deamon" which means evil or unclean.  Demons are fallen angels and followers of Lucifer from the Old Testament of the Bible.  These entities were never human.  Ouija Boards, seances, and the practice of black magic are some ways that demonic entities enter this world.  When the demonic are encountered a religious intervention with a specially trained demonologist  is needed.