Discussion
Which of the following is correct in forming final opinion on DNA profile comparison ?
(I) Matching
(II) Exclusionary
(III) Inconclusive
Answer: D
All three, (I), (II) and (III), are correct.
When a questioned DNA profile is compared with a reference profile, the examiner's conclusion takes one of three forms. Matching (inclusion): the profiles are the same at all compared loci, and a statistical weight is attached. Exclusion: the profiles differ, so the reference person cannot be the source. Inconclusive: the profile is partial, degraded, a complex mixture or affected by artefacts, so neither inclusion nor exclusion can be stated.
Standard interpretation guidelines, such as those of SWGDAM, recognise all three. Options listing only two leave out a legitimate category.
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