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One of the main disadvantages in this field is the lack of trained specialists. ^[1] As of 2008, there are no academic centers or training facilities for the use of pollen in forensics in the U.S. ^{[2] [1]} This is crucial because of the expertise required to identify palynomorphs and to apply the data to geolocation information. ^[3] Many things could go wrong and invalidate any samples collected, especially if the personnel handling them is not experienced. On the subject of experience, contamination is another major problem that can invalidate the use of a sample as evidence. Therefore it is important that samples are collected early on with collection sites identified depending on the case. ^[4]

Limited access to international databases can also prove to be an issue when it comes time for the analyst to identify pollen evidence to a specific family or genus of plants. ^[5] Currently, a database from Austria called PalDat exists but there are no known databases to exist for North America.

• Mildenhall DC, Wiltshire PEJ, Bryant VM. Forensic palynology: Why do it and how it works. Forensic Science International 2006; 163(3):163–72. doi: 10.1016/j.forsciint.2006.07.012
  • This is a peer-reviewed scientific journal, so it should be a reliable source. It covers the topic in some depth, so it's helpful in establishing notability.
• Bryant VM, Jones GD. Forensic palynology: Current status of a rarely used technique in the United States of America. Forensic Science International 2006;163(3):183–97. doi: 10.1016/j.forsciint.2005.11.021
  • This is a peer-reviewed scientific journal, so it should be a reliable source. It covers the topic in some depth, so it's helpful in establishing notability.
• Alotaibi, S. S., Sayed, S. M., Alosaimi, M., Alharthi, R., Banjar, A., Abdulqader, N., & Alhamed, R. (2020). Pollen molecular biology: Applications in the forensic palynology and future prospects: A review. Saudi journal of biological sciences, 27(5), 1185–1190. https://doi.org/10.1016/j.sjbs.2020.02.019
  • This is a peer-reviewed scientific journal posted on the National Center for Biotechnology Information website, so it should be a reliable source. It covers the topic's applications and future in some depth, so it's helpful in establishing notability.