A.F.I.S. Automated Fingerprint Identification System Glenn Langenburg Forensic Scientist Latent Print Examiner Minnesota Bureau of Criminal Apprehension
Real Life v. Fantasy
Classification l Loops~ 60% l Whorls~ 35% l Arches~ 05%
A.F.I.S. l Automated Fingerprint Identification System
A.F.I.S. l Automated Fingerprint Identification System l Searches via a mathematical algorithm
Latent Entry
M.A.F.I.N. l Midwest Automated Fingerprint Identification Network l Minnesota, North Dakota, South Dakota l Criminal histories only!
General Functions l Criminal history check » 10 print card l Civil background check » 10 print card l Latent fingerprint search » Small distorted portion vs. 10 print card
I.A.F.I.S. l Integrated AFIS system l Request to build in 1991 l Approx. 40 million FP cards l Online August 1999 l 35 States online as of Jan l Turn-around time: » 2 hours for 10-print cards » 24 hours for latent print searches
Some Stats l 1.3 million submissions/month » 49% criminal » 51% civil l 90,000 fugitives ident./month
Case Study : Who Killed Barry Bridge? l On July 9, 2002: » Morrison Co. S.O. » Fellow employee not breathing » Little Falls, MN » EMS arrives and reports: –Barry Bridge is deceased
Morrison County
Scene l Morrison County Deputies arrived l No sign of struggle l Decedent drank a lot, drugs? l Last seen leaving bar l Body to Ramsey Co ME
BCA Gets Involved l Thought to have record with Henn. Co. l Get thumbprints from Bridge (7/11) l Ran in M.A.F.I.N. » No hit l Teletype sent to AR, TX l Iona Bridge, mother, contacted (7/15) l ??? l Barry Bridge in Pennsylvania
Who’s the Dead Guy? l ME report: » Subgaleal and subdural hemorrhage » Focal contusions on extremities and left lateral thoracic wall region » Hemorrhage to left dorsal thoracic wall » Healing fractures to right dorsal thoracic wall » Micronodular cirrhosis of liver » BAC = 0.198, no presence of drugs
…in English… l Stumblin’ drunk l Closed head trauma l Accidental death l But who is he?
I.A.F.I.S. l 7/23 Prints run through I.A.F.I.S. l 7/24 Response
,6 7 7
Decedent Identified l Randall Rhodes (“Randy”) l From Little Rock, AR l FP in AR and TX l Contacted Glenda Foster, Benton, AR l Filled in the details l Morrison Co. county burial plot l Who killed Barry Bridge?
Reality TV?
Sources Used Ashbaugh, David R. Quantitative-Qualitative Friction Ridge Analysis, Lee, Henry C. Advances in Fingerprint Technology, U.S. Dept. of Justice, FBI. Thanks to: Morrison County Sheriff’s Office, Sheriff Tschida Ramsey County Medical Examiner’s Office, Dr. M. McGee Sol Agramont, Nogales, AZ