Question 7.18: In order to decide whether a person should be pronounced gui...
In order to decide whether a person should be pronounced guilty of murder, a laboratory is asked to perform a comparative analysis of a blood sample from the defendant and one containing a mixture of blood from the defendant and the victim blood found in the crime scene. The analysis involves determining the DNA sequence of the defendant, the victim and the mixed blood sample. Please complete the following table by identifying the different elements.
| Socio-economic problem | |
| Analytical problem (1st step) | |
| Analytical information (2nd step) | |
| CMP to be used (3rd step) | |
| Verification of the results (4th step) |
| Socio-economic problem | Whether the defendant is guilty or not guilty |
| Analytical problem (1st step) | A comparative analysis of blood from the victim and the defendant with that found in the crime scene |
| Analytical information (2nd step) | A qualitative (comparative) characterization of the blood samples for DNA |
| CMP to be used (3rd step) | – Individual analyses of blood from the victim and the defendant – Analysis of the mixed blood sample found in the crime scene and of an artificial mixture containing blood from the victim and the defendant – Separation of the two types of blood contained in the mixture for individual analysis |
| Verification of the results (4th step) | Comparison of the results for the victim-defendant mixed blood sample and the crime scene sample Comparison of the DNA profile for the defendant with that for the mixed sample not containing blood from the victim |
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