Question

Two samples of dirt are collected from a suspect's tread in his shoe and a crime scene. The forensic investigator does a gross examination of color, texture, shapes, and foreign objects. She notes very similar characteristics. What must she also do to further prove these samples are from the same soil?
A) place in acid to see if it dissolves
B) do the same examination under a microscope
C) combine the samples to see if they look the same
D) pour the same in the soil of where you think it came from and see if it matches

Answer 1

Answer:

Option B) do the same examination under a microscope

Explanation:

In order to determine the exactness of the sample, the examination over a microscope has to be done.

The microscope provides detailed information about the morphology of the particles. In other words, the microscope examines the minute details of the soil particles. These include the particle size, orientation, foreign substance if any, as well as any discrepancies in the two samples :the shoe and soil.

In the same lab, an examination of the shoe is also conducted. There must be the same particles on the soil and shoes. Thus, a microscope is able  to do that.

Answer 2

Do the same examination under a microscope