Foundations
Application of science to law
Forensic science
First step of crime scene investigation
Secure the scene
Separate Packaging
Most common fingerprint pattern
Loop
r DNA
Individual evidence
Bias favoring prior beliefs
Confirmation Bias
Prevents Witnesses influencing each other
Separate the witnesses
Begins at the crime scene
Chain of custody
Least common fingerprint pattern
Arch
Medullary index compares
Medulla diameter to hair diameter
Principal stating that every contact leaves a trace.
Lockard's Exchange Principle
Prliminary Plan of investigation
Scan the scene
Must occur before searching
Documentation
Ridge details used for identification
Minutiae
Fiber evidence usually does this
Narrows possible sources
Evidence based conclusions rely on this
Data
Documentation stage
See the scene
Break in chain of custody
Cause Trial Error
Fingerprint comparison method
ACE-V
Proper forensic reporting language
Consistent with
Unrealistic expectations from TV
CSI Effect
Evidence collection stage
Risk caused by random searching
Missed evidence
Database for fingerprint comparison
AFIS
Type of evidence that links but does not uniquely identify
Class evidence