2Evidence 3 different kinds of fingerprints Latent Prints Patent Prints Plastic Prints
3Latent PrintsA chance or accidental impression left by skin on a surfaceChemical, Electronic, and physical processing techniques show visualization of the invisible printPrint comes comes from sweat, motor oil, blood, paint, ink…Very valuable physical evidence
15Case Study: Conviction Through Enhanced Fingerprint Identification In 1990 an unknown assailant sexually molested and fatally stabbed a young woman. The only evidence was a pillowcase, found next to the victims body. It had several blood stains, one stain showed some faint fingerprint ridge detail.
16InvestigationPillowcase to the departments forensic unit for bloodstain pattern analysisStains were consistent with a knife bladeFingerprint had enough ridge detail to go further into the investigationImage enhancement developed likely suspects and the the DNA proved the fingerprint match was correct
17Interview“What kind of educational background do you have to have in order to work as a fingerprint expert?”“It depends, there are different levels. There is on the job training and job preparation training; NCIC National Crime Index Certification and International Association of Identification. The person with the least amount of experience has worked here for 7 years.”
18“What is a typical day like for you?” “It depends, I examine fingerprints of individuals that are arrested and process their identification to check their previous arrest history. I also review the work of coworkers to make sure they make proper identifications.”
19“Are you a forensic specialist all the time or do you have a "day job" “There are different shifts. There is a late unit and a temperate unit which is 24 hours. There are three 8 hour shifts each day. There is a shift from 4am to 3 pm.”