Forensic psychology
Forensic psychology

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Forensic psychology

6.4 DS Sund’s investigation so far

DS Sund collected a great deal of information from the two interviews she conducted. From this she was able to piece together a description of what happened in the crime and also what the perpetrators looked like.

She searched the police database for crimes that had been committed in a similar fashion and/or by similar looking people and this generated a few possible leads. To help generate suspects, DS Sund decided to ask Seth to construct a facial composite of the two perpetrators whose faces had been revealed during the course of the crime – these being the driver of the car and the unmasked robber.

Using the EFIT-V composite system, Seth produced the two images in Figure 11. DS Sund then posted these images on various websites and public noticeboards all around the city, along with a brief description of the crime committed. After the images had been displayed for a week, she had received 76 calls from members of the public who thought they recognised one or both of the images. After diligently following up all the possible leads, DS Sund narrowed her list of suspects to six people, who she then interviewed about their possible involvement in the crime and where they had been when it was being committed.

Figure 11 EFIT-V images of suspects produced by Seth

Investigating the information supplied further, she was able to rule out four of the six people as there was evidence that they could not have been at the crime scene at the time the crime happened. The remaining two people knew one another, fitted the descriptions provided by Lila and Seth and did not have an alibi that could be confirmed by anyone other than themselves. One of them also had a previous conviction for an armed robbery.

Without any physical, or other, evidence to go on, DS Sund decided to hold identification procedures. If neither witness was able to identify either of the two suspects, then she would rule them out of her investigation.

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