Summary of "Pollen Analysis Puts MURDERER Behind Bars | FULL DOCUMENTARY"

Expert witnesses play a critical role in solving crimes by providing deep level knowledge to determine if something stands out.

Pollen analysis can link people and objects to specific environments, helping solve complex cases.

In the case of Joanne Nelson's murder, Pollen analysis led to the discovery of her body in a wooded area, ultimately leading to the conviction of her fiance, Paul Dyson.

In the case of Diana Garbett's murder, Bloodstain pattern analysis revealed that she was attacked while she slept, contradicting her husband's account of a burglary.

Financial troubles and marital tensions were also key factors in the investigations of both cases.