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An Exploration Of Protein And Dna Components In Fingerprint Residue, Ashley Borrego Aug 2019

An Exploration Of Protein And Dna Components In Fingerprint Residue, Ashley Borrego

Student Theses

The main focus of this project was to investigate the protein and DNA components in both sebaceous and eccrine fingerprints. This study investigated the relative content of DNA and proteins in eccrine fingerprints to sebaceous fingerprints. All volunteers were instructed to wash and dry their hands prior to depositing parallel thumbprints. Twenty volunteers were instructed to touch their face to produce sebaceous prints, and 5 volunteers were instructed to wear gloves over a heat source to produce sweaty or eccrine prints. Microscopy was used to score the cellular debris of the right fingerprint on a scale of 1-4 based on …


Optimizing Methods For Separation Of Adhesive Tape From Fabrics And Obtaining Latent Prints From Adhesive And Non-Adhesive Sides, Elizabeth Vosburgh Jan 2019

Optimizing Methods For Separation Of Adhesive Tape From Fabrics And Obtaining Latent Prints From Adhesive And Non-Adhesive Sides, Elizabeth Vosburgh

Forensic Science Theses

Fingerprinting is a valued part of forensic science analysis. It has been around for decades, and has advanced with the passing of time. There have been numerous studies of the different ways analysts have encountered fingerprints in the field—but none on those deal with the removal of tape from fabric. To investigate this, eight fabric types (a cotton/polyester mix, spandex, denim, jeans, fleece, flannel, polyester, and vinyl), three commercially available tapes (duct tape, black electrical tape, and packaging tape), have been stuck together and separated with four different techniques (manual pulling apart, Un-Du commercial adhesive remover, liquid nitrogen, and a …