Chain of custody: track the evidence
Tue, Sep 8, 2026 · Week 3 · Principles of Biomedical Technology (Principles of Biomedical Science)
Today's goal: Check four simulated handling records and write one complete evidence-transfer entry.
This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.
Practice case M; item M-1, a dry blue thread. M1 collected it from a chair at 9:00 AM on September 8, 2026, labeled and sealed the packet, and kept it until the transfer. At 9:15 AM, M1 handed it to M2 for secure storage in evidence locker 2. The label matched M-1, the seal was intact, and both signed at the handoff. No gap is shown in this interval. The record does not tell us what happened after 9:15 AM.
| Field | Model M entry |
|---|---|
| Case and item | M; M-1, dry blue thread |
| Date and time | September 8, 2026, 9:15 AM |
| Released by / received by | M1 / M2 |
| Purpose and destination | Secure storage; evidence locker 2 |
| Package condition | Label matches M-1; seal intact |
| Transfer confirmation | M1 and M2 signed at the handoff |
This model shows the level of evidence and organization needed to complete: Original practice for evidence documentation. This is not evidence from the PLTW case.
- Date and label the entry.
- Record the procedure, observation, or design decision clearly.
- End with what the evidence means and the next step.
Keep the structure. Replace the question, facts, measurements, and evidence. Then recheck units, vocabulary, and whether the conclusion goes beyond the evidence.
Also due today: Use the handout to review R1 through R4, write Record T's transfer entry, and finish your two conclusion sentences. Submit the three parts together.
Turn in: Worked Model M: a complete transfer entry
Go to Schoology to turn this in.
Submit one PDF. Put your first and last name in the document header. Name the file: FirstName LastName - Assignment Title - YYYY-MM-DD.pdf.
Open Schoology PDF upload helpIf you cannot get in, see Mr. Mendoza. Do not skip the work.
Claim ceiling: Judge the handling record, not the person. A missing entry or a torn package cannot prove contamination, guilt, or a cause of death; it shows what still needs checking.
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.
It builds this reusable test skill: Distinguishing a transfer record from a package-condition check.
- Name the concept or data pattern being tested.
- Cross out choices that violate that rule or the evidence.
- Justify the best remaining choice before checking the answer.