Question

Arrange the following in correct steps for collection of tool marks from the crime scene.
A. Trace evidence associated with tool marks should be prevented from loss or contamination
B. Marks on metal should be covered with oil to prevent oxidation
C. Cast of tool marks should be prepared to take impression or the whole object to be transported to the crime lab
D. Close-up photography

• A. A, D, C, B
• B. D, A, B, C
• C. C, B, D, A
• D. A, C, B, D

Hint:

The universal rule for evidence collection is: \textbf{Document, then Collect.} First photograph and sketch. Then, collect the most fragile evidence (trace) before moving on to collecting the main item or making casts. Preservation of the collected item is the final step.

Answer 1

The Correct Option is A

Step 1: The first priority is to preserve the trace evidence. Therefore, trace evidence associated with tool marks should be prevented from loss or contamination. This ensures that no additional handling destroys microscopic details. So, the first step is:
\( A \)  

Step 2: After securing evidence, close-up photography of the tool marks is done. This provides a permanent record of the scene before any further handling or collection. So, the second step is: 
\( D \) 

Step 3: Then, casting of tool marks is carried out, or the entire object containing the mark is transported to the laboratory for further analysis. So, the third step is: 
\( C \) 

Step 4: Finally, in case of metallic marks, they are covered with oil to prevent oxidation and preserve them until analysis. So, the last step is: 
\( B \) 

Final Answer: 
\( \boxed{A \; \rightarrow \; D \; \rightarrow \; C \; \rightarrow \; B} \)