Life after death cannot be proven—but neither can it be disproved. No scientist can with any certainty say that life after death does not occur. He may say that much would suggest it does not, and substantiate his claim with reference to the logic of matter and the physical world. But logical parameters will naturally capture only what is logical; the non-logical slips through its mesh.
Does the non-logical exist?
If we stand at the boundary of the logical, is there anything beyond? Anything we might sense or discern?
Let us proceed step by step.
What is death?
What is the body?