Why a checklist before every lab
The assigned eight learning pathways use fictional cases, paper items, supplied images, and synthetic records. No real bodily samples, personal fingerprints, suspect profiles, chemicals, ultraviolet sources, cultivation, firearms, ammunition, or projectiles are authorized. Professional methods are studied conceptually, not performed. A paper exercise develops documentation and reasoning; it does not certify a forensic method or replace supervised practical assessment.
It also does something quieter: it forces the student to arrive ready. The most dangerous lab partner is the one who skimmed the procedure in the hallway. This checklist closes that gap. Print one for every session, work top to bottom, and do not pick up a single piece of evidence until the last box is checked.
The goal is not to follow rules. It is to walk to the bench already knowing the hazards, the steps, and the result you expect.
1 — Safety
Nothing below this section happens until everything in it is done. No exceptions, every lab, every time.
- Only the assigned paper cards, diagrams, envelopes, ruler, and calculator are present; no substituted biological or chemical materials.
- All cases, profile labels, and records are fictional. Do not collect fingerprints, hair, DNA, personal records, or device data.
- No liquid stains, drops, sprays, weapon demonstrations, or physical trajectory tests are performed.
- Professional-method descriptions and images are background reading, not authorization to reproduce a procedure.
- Work surface is clear; original paper items remain separately labeled to model contamination control without introducing hazards.
- Use an instructor-approved accessible image, enlarged diagram, or supplied-data alternative when required.
- Stop if an unapproved material appears; equipment failures, approved absences, and accommodations are handled separately from retry tokens.
2 — Setup
With safety confirmed, build the bench so the work flows without scrambling mid-analysis.
- The full procedure read end to end — not skimmed — so you know what step comes next.
- Paper diagrams, ruler, calculator, envelopes, and independent recording sheets are ready; no specialist chemical kits are required.
- Scale, units, boundary convention, and reading uncertainty are recorded before measurements.
- Use only paper-item scale images; exclude faces, names, personal records, and private device content from documentation.
- Item codes and supplied custody records are checked, retaining gaps and seal observations without inventing repairs.
- Controls, comparison rules, reference labels, and the hidden key are prepared; worked answers stay covered until initial decisions are recorded.
- Case notebook open to a fresh, dated page with the title and question already written.
3 — Readiness: the pre-lab questions
This is the section that separates a technician from an analyst. Before the first measurement, the student should be able to answer these in writing — in the case notebook, in their own words.
- What is the question? State, in one sentence, what this analysis is trying to find out or determine.
- What is the forensic science? Write the principle or method the analysis depends on — the class vs. individual characteristics you'll compare, or the test you'll run.
- What is my decision rule? Record the allowed consistent, excluded, negative, inconclusive, and invalid outcomes before seeing a narrative or the answer key.
- What am I recording, and how? Name every observation and measurement you will record, and how you will note its uncertainty.
- What could go wrong? Identify the one or two steps most likely to introduce error or contamination, and how you will prevent them.
- What does sound work look like? A complete original record, checked denominators and assumptions, independently recorded comparisons, and honest limits — not a preferred positive result.
A student who answers all six is not guessing their way through a procedure — they are running an analysis they understand, with a result they can already roughly anticipate. That is exactly the readiness the case-notebook entry is built to capture, and the kind of preparation a lab defense is designed to reward.