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CODIS and Database Searches. Specimen Categories Alleged Father Biological Mother Convicted Offender Elimination, Known Forensic Unknown Missing Person Population Suspect, Known Unidentified Person Victim, Known. Indexes Specimen Categories Population Population

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slide2

Specimen Categories

    • Alleged Father
    • Biological Mother
    • Convicted Offender
    • Elimination, Known
    • Forensic Unknown
    • Missing Person
    • Population
    • Suspect, Known
    • Unidentified Person
    • Victim, Known
slide3

Indexes Specimen Categories

Population Population

Convicted Offender Convicted Offender

Casework Forensic Unknown

Unidentified Person

Suspect, Known (in some cases)

high stringency
High Stringency
  • The number of alleles and the allelic values must be the same.
  • If the evidence sample has two alleles at one locus, the matching sample must have two alleles of the same value.
slide6

Moderate Stringency

  • The sample with the fewest number of alleles determines the number of alleles that must match.
  • If one sample has two alleles and the other has one allele, then only one allele must match to be considered a moderate
slide7

Low Stringency

At there must be at least one allele with the same value in both samples