There are plenty of records and academic studies about ‘near death experiences’ (NDE) where people being clinically dead describe what happened while they were dead. The question is how to interpret these records?
Was the person truly dead? Were the memories from the time she/he was clinically dead or from the moment when this person was dying or returned to life?
My own interpretation is that many of these experiences are caused by dying brains. I read that there is (often?) high brain activity just before and after death (seconds). This may cause some false memories.
Yet, there are cases where the person has been clinically dead for >10 minutes (no brain activity) and has described what happened during that time. The persons told that they were invisible observers outside the body, watching what the doctors and nurses were doing. It is difficult to explain these cases as false memories created by dying brains.
There are also cases which may be challenging to interpret within a narrow, ‘traditional’ christian framework but may tell about life after death.
I have been told that elderly and terminally sick patients often see dead relatives or friends within the last six months of their life, often close to death. They may talk with such a ‘visitor’ although nobody else sees the ‘visitor’. Seeing people that do not exist or other hallucinations is a side effect of some drugs. My mother saw how very realistic objects passed by her peripheral vision after a very minor stroke in the area of the brains that handle visual signals. It would be (too) easy to say that the ‘visitors’ close to death are just hallucinations. Yet, they seem to commonly appear before death although the person does not yet have problems in thinking, have not seen any hallucinations earlier and there is no changes in medication.
In some recorded cases, a small child have had memories of the life of another person died years before the child was born. The memories have been quite detailed and accurate but have usually faded as the person has aged. I watched an interview where one such person (already adult) described his feelings as strange, like there were two personalities within the same body. Difficult to interpret, could it be a dead personality getting to another body or some kind of ‘demon’ causing misleading memory transfers? I don’t know. Life is stranger than fiction.