Expert Evidence: Case Studies Part 4

The transcript discusses the investigation of DNA evidence found on a station platform. It explores the likelihood of the DNA being accidentally transferred versus being directly deposited by the individual's presence. Various scenarios are considered, but the conclusion leans towards the DNA being present due to the individual's presence on the platform. The discussion highlights the challenges in assessing the likelihood of different scenarios without concrete evidence.

What was the initial assumption about the DNA found on the station platform?

• It was definitely placed there by the suspect.

• It was likely transferred accidentally.

• It was near impossible for it to be transferred accidentally.

• It was placed there by a third party.

What is the strongest likelihood regarding how the DNA got onto the platform?

• It was left by another person.

• It was deposited by the individual's presence.

• It was transferred by wind.

• It was a result of contamination.

What does the speaker suggest about the possibility of accidental DNA transfer?

• It is equally likely as direct deposition.

• It is less likely than direct deposition.

• It is more likely than direct deposition.

• It is the only possibility.

What was the result of the DNA test conducted on the platform sample?

• It showed no DNA presence.

• It revealed a strong presence of the suspect's DNA.

• It indicated contamination.

• It was inconclusive.

What is the common method of DNA deposition according to the speaker?

• Accidental transfer from another location.

• Direct deposition from a person.

• Deposition by environmental factors.

• Transfer through objects.