A.F.I.S. Automated Fingerprint Identification System Glenn Langenburg Forensic Scientist Latent Print Examiner Minnesota Bureau of Criminal Apprehension.

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

Loops ~ 60% Whorls ~ 35% Arches ~ 05%

A.F.I.S.

Automated Fingerprint Identification System

A.F.I.S.

Automated Fingerprint Identification System

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Searches via a mathematical algorithm

Latent Entry

M.A.F.I.N.

Midwest Automated Fingerprint Identification Network

Minnesota, North Dakota, South Dakota Criminal histories only!

General Functions

Criminal history check» 10 print card

Civil background check» 10 print card

Latent fingerprint search» Small distorted portion vs. 10 print card

I.A.F.I.S.

Integrated AFIS system Request to build in 1991 Approx. 40 million FP cards Online August 1999 35 States online as of Jan. 2002 Turn-around time:

» 2 hours for 10-print cards» 24 hours for latent print searches

Some Stats

1.3 million submissions/month» 49% criminal» 51% civil

90,000 fugitives ident./month

Case Study: Who Killed Barry Bridge?

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

Morrison County Deputies arrived No sign of struggle Decedent drank a lot, drugs? Last seen leaving bar Body to Ramsey Co ME

BCA Gets Involved

Thought to have record with Henn. Co. Get thumbprints from Bridge (7/11) Ran in M.A.F.I.N.

» No hit Teletype sent to AR, TX Iona Bridge, mother, contacted (7/15) ??? Barry Bridge in Pennsylvania

Who’s the Dead Guy?

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…

Stumblin’ drunk Closed head trauma Accidental death But who is he?

I.A.F.I.S.

7/23 Prints run through I.A.F.I.S. 7/24 Response

1 12 23 34 45,6 5,67 7

Decedent Identified

Randall Rhodes (“Randy”) From Little Rock, AR FP in AR and TX Contacted Glenda Foster, Benton, AR Filled in the details Morrison Co. county burial plot Who killed Barry Bridge?

Reality TV?

Sources Used

Ashbaugh, David R. Quantitative-Qualitative Friction Ridge Analysis, 1999.

Lee, Henry C. Advances in Fingerprint Technology, 1991.

U.S. Dept. of Justice, FBI.

Thanks to:

Morrison County Sheriff’s Office, Sheriff TschidaRamsey County Medical Examiner’s Office, Dr. M. McGeeSol Agramont, Nogales, AZ

Email: [email protected]