Free Lesson — Module 1: Forensic Sketching
The 5-Minute Observation Drill
Why This Matters
Forensic sketching is the foundational discipline of structured documentation.
Memory is unreliable.
Observation is trainable.
Hand-drawing slows cognition.
Structure reduces distortion.
Grids prevent exaggeration.
This exercise demonstrates the difference between seeing and assuming.
The 5-Minute Observation Drill
Open the image below.
Set a 60-second timer on your phone.
Study the room carefully.
When time ends, scroll down. Do not return to the image.
Focus on:
• Layout
• Objects
• Relative spacing
• Entry/exit points
• Light source direction
Use an external timer only.
Produce Your Artifact
Download the worksheet below. Print if possible.
Using pencil and ruler:
• Recreate the room layout from memory.
• Label at least 10 objects.
• Mark entry and exit points.
• Indicate light source direction.
• Separate observation from inference.
Leave blank space if uncertain.
Accuracy is discipline.
Reflection
After completing your sketch:
Scroll back to the image.
Compare.
Ask yourself:
• What did I miss?
• Where did proportion shift?
• Where did assumption appear?
Memory compresses. Structure corrects.
Integrity Rule
Observation is not inference.
Documentation is not accusation.
Restraint protects credibility.
Optional
Share your completed artifact (grid only, no context) and tag @diydetective.
Artifact-focused only.
Continue Module 1
The full module expands this discipline into structured spatial reconstruction.