Watch this youtube of Neil and you might see what I mean. One thing that a scientist should know is that you cannot perform experiments on sentient beings without being able to rely on a repeatable response. But you can use forensic science to draw conclusions about their behavior. We can only rely on forensic science to investigate sensual, spiritual beings.
For example, you can run experiments all day long on ghosts, but if you cannot see them and put a polygraph on them, you are just waisting your time.
There are thousands of documented cases of messages from beyond the grave, not just near death experiences. A forensic comparative study of these can quickly result in a number of objective truths. For example, if you compare the three works from Johannes Greber in German (1874–1944), Reverend G. Vale Owen in England (1869–1931) and Beatrice Brunner in Switzerland (1910–1983) you will discover the same information about Jesus was provided in three different countries, to three different audiences and two different languages.