Forensics: Crime Scene Detective – Tutorial 3 Walkthrough

Tutorial 3 Evidence Overview

Photos, Evidence and Fingerprints in the apartment:
Biological Sample (Unknown)

Evidence for Digital Analysis in the Lab:
DNA Analysis

Briefing

This tutorial teaches you about collecting and analysing biological samples.

Witness Statement Jacob Doe:
“Someone injured themselves and left behind a biological sample.”

Travel to the Crime Scene

First, take the number markers and put one next to the smudge on the kitchen counter. Then, switch to the camera to take a photo. In my case, I had too much of an overlap and had to re-place the marker.

Put the camera back and take the Bio Material Kit. Move it around in the smudge and put it into the test tube.

Evidence:
Biological Sample (Unknown)

Analyzing the Evidence

Return to the lab and read the email on your computer. The next step is to analyze the DNA sample from the crime scene to create a DNA profile.

In the lab are now two stations unlocked: The Bio Evidence Analysis and the DNA Comparison. Let’s start with the Bio Evidence Analysis to create a DNA profile first. You have two samples: One from John Doe and an Unknown one. You need to create a DNA profile of both samples. Put both tubes into the machine and start the analysis. Wait until both samples are complete and pick up the report.

Evidence:
DNA Profile (John Doe)
DNA Profile (Unknown)

Now, go over to the DNA Comparison station and place the two samples. Use the control knobs to scale and align the profiles. Accuracy is important here! Decide if they match or not, export the results and pick them up.

The sample matches the pattern in the center row from 13 to 22.2.

Interact with the e-mail computer to send off your evidence.