John Hay Biomedical • Original simulated practice • PBS6782
The Case Opens: Case B (RESPAWN, a gaming lounge)
PBS • Week 3 • Investigation Day 4 • September 10, 2026 • PBS6782 works Case B. Keep its facts separate from the other section's case.
Your work today
Read your section's case documents. Record ten entries labeled observation (O) or inference (I). Start the timeline with sources and write one open question for the next scene walk.
Complete the existing Daily Evidence Sheet, Parts A to E. In Part C, explain in 3 to 5 sentences why today's documents cannot answer your open question. Include and label one observation and one inference from your table.
Hand in the paper sheet or submit one PDF to Wk3 D04 · The Case Opens (PLTW 1.1.1), assignment 8520276165. The deadline is September 10, 2026 at 11:59 PM. Your notebook pages stay in your Investigative Notebook. Today's portal page links everything below.
Your documents and where they are
- Investigation Day 4 pack, Case B (5 pages): briefing, released documents, procedures.
- Daily Evidence Sheet, Day 4 (9 pages): the worked model on pages 2 to 3, your make-up extracts on pages 4 to 5, Parts A to E from page 6.
- Investigative Notebook pages 10 to 12: the Day 4 Cornell page, the master timeline (eleven rows, room for the ten-entry log) and the suspect matrix. Do not complete later-day pages.
- 911 call, RESPAWN case: the fictional dispatch recording for your case. The source script is printed at the end of this page.
- PBS6782 official PLTW handouts and daily directions, kept separate from this practice.
What can a document tell you?
An observation records what a document states or shows. An inference adds an explanation, estimate or calculation. Labeling the difference lets someone check your work.
A caller's words are evidence of what the caller reported. They do not automatically prove the caller's explanation. Write "the caller reports" when that distinction matters.
A timeline puts events in time order and names each source. Think of the source column as a label on a folder: it helps you find the record again, and the label alone does not prove the record is correct.
Keep the source beside the statement. Keep the question beside the gap.
Cause and manner, before you read the briefing
Cause of death means the injury or disease responsible for the death. Manner of death describes the circumstances. Those questions require different evidence, and today's case documents leave both open. The briefing uses a machine analogy (what broke versus how it happened); bodies have interacting injuries and diseases, so the comparison has limits. The briefing's blood loss, brain injury and infection are general examples, not findings in either classroom case. A statement that a heart stopped does not identify the underlying injury or disease.
Optional reference for the definition: CDC, instructions for completing the cause-of-death section of the death certificate (medical examiner and coroner version, two pages). It is a professional reference, not a form for you to complete.
Separate worked model: the bicycle shop
This fictional practice example comes from both Day 4 evidence sheets, pages 2 to 3. It is separate from Cases A and B. Do not place its events in your case log.
The practice call record states a call time of 2:38 AM. The caller says they arrived about six minutes earlier. The alarm company's separate log records an alarm at 2:05 AM.
| Time | Entry | Source | Label |
|---|---|---|---|
| 2:38 AM | The call record states this call time. | Practice DOC-1 | O |
| About 2:32 AM | Arrival estimated by subtracting six minutes from 2:38 AM. | Practice DOC-1 plus arithmetic | I |
| 2:05 AM | The alarm log records the alarm. | Practice alarm log | O |
The calculated arrival stays approximate because the caller said "about". Each row keeps its source. The alarm time and the arrival time describe different events.
Time method: arrival time = call time minus the stated delay. Time gap = call time minus arrival time. Hours = minutes divided by 60 minutes per hour. Practice: 2:38 minus 2:32 gives six minutes; six divided by 60 gives 0.1 hours.
For Case B, use the arrival time stated in DOC-3. Do not subtract an invented delay from DOC-1. Record the source of each time before subtracting.
Work through the same sheet
- Read the briefing and glossary. Complete Part A using the assigned reading. Where Part A asks for a citation, copy the first three words of the sentence you used.
- Record ten O/I entries with their sources in the initial observations log. If you need more room, continue on the back or on a continuation page in the same submission; the notebook's master timeline page also has eleven rows.
- Complete Part B. Your first timeline needs at least five entries, each with a source and an O/I label. You may reuse entries from your ten-entry log.
- Compare what the sources say about the same detail for B2. State what agrees, what differs and what remains unknown. A routine describes usual behavior; it does not confirm today's event.
- For B3, show the arrival-to-call calculation with units. Case B uses DOC-1 for the call and DOC-3 for the arrival. Use the formula in the worked model.
- Write the open question and its 3 to 5 sentence explanation in Part C. Complete the vocabulary use in Part D and the existing self-check in Part E.
One correction to read before Part B
Case B's sheet says every entry must come from DOC-1 or the background card and its table header lists only those two, while B3 needs the arrival time that only DOC-3 supplies (page 4). Read the allowed sources as DOC-1, the background card and DOC-3, and write DOC-3 in the source column when you use it. The sheet's "two documents" wording in Part C does not exclude the supplied DOC-3.
Absent or new? Your case's make-up extracts
All ten entries below come from your evidence sheet, physical page 4. They are excerpts or close paraphrases of its public make-up table, not new interviews or medical findings. Write "canned data set" at the top of Part B when you use them. Allowed sources for your case: DOC-1 (the dispatch call record), the background card and DOC-3 (the persons-of-interest brief with the caller's badge-in time).
| Time in source | Supplied information | Named source on page 4 | Label |
|---|---|---|---|
| 7:16 AM | The operator stamps the call at 7:16 AM. | DOC-1 | O |
| No clock time | The caller says, "I just got to work." DOC-1 gives no number of minutes. | DOC-1 | O |
| 7:14 AM | The caller's interview card says, "I badged in at 7:14 like always." | DOC-3, persons-of-interest brief | O |
| None | The caller reports the boss on the floor behind the counter, not responding, with a swollen face. | DOC-1 | O |
| None | The caller reports the usual drawer open and empty. | DOC-1 | O |
| None | The caller reports a shelf knocked over on her and a smoothie nearby. | DOC-1 | O |
| None | The card records a severe peanut allergy since childhood and emergency visits at ages 9 and 21. | Background card, record | O |
| Work hours, daily routine | Employees state that the epinephrine auto-injector was kept in the counter drawer. | Background card, statements | O |
| About 6:00 AM, usual routine | Statements describe arriving alone around 6:00 AM most mornings and making and tasting the first protein smoothie. | Background card, statements | O |
| Two weeks before; ten days before | The card lists an employee fired over register discrepancies and a tournament hosting contract won over a rival lounge. | Background card | O |
Supplied help on physical page 5
- The sheet supplies arrival at 7:14 AM from DOC-3 and a call at 7:16 AM from DOC-1. The gap is two minutes, about 0.03 hours. Name both sources when showing your work.
- The background statements describe where the injector was usually kept. The caller reports the drawer open and empty. These describe different times and raise a question about the missing device. They do not establish who moved it or why.
- The sheet's public make-up example asks where the auto-injector is and what the counter near the smoothie and open drawer shows. That is an example open question, not a required answer.
- The supplied matrix guidance leaves the evidence-for and evidence-against columns empty and keeps motives in the claimed column. Keep responsibility unresolved; do not invent evidence to fill blank cells.
Case A belongs to PBS1282; its records never enter Case B's log.
Terms, grouped by where you first use them
Core terms, used from the first entry
| Term | Meaning here |
|---|---|
| Observation (O) | Something directly recorded or reported in a source. Keep the wording clear about who reported it. |
| Inference (I) | An explanation, estimate or calculation you add using the evidence. |
| Source | The document or record where information came from. |
| Document ID | A label such as DOC-1 that identifies a source. |
| Evidence | Information used to check a question or claim. |
Timeline terms, used in Part B
| Term | Meaning here |
|---|---|
| Time stamp | A clock time attached to an event. Write "none" if the source gives no clock time. |
| Timeline | Events organized by time, with sources. |
| Elapsed time | The time between two events. |
| Decimal fraction of an hour | Part of an hour written as a decimal; divide minutes by 60. |
| Hard or soft timeline field | The notebook's distinction between a firm recorded time and an approximate time. Keep the sheet's O/I labels too. |
Source terms, used in B2
| Term | Meaning here |
|---|---|
| Dispatch | The emergency call record used at the start of this classroom case. |
| Transcript | A written version of spoken words. |
| Background card | The supplied summary of records, routines and reported statements about the fictional person. |
| Secondhand statement | A report of what someone else said or noticed. |
| Routine | Something a person usually does. It may not have happened on this occasion. |
| Corroboration | Independent sources supporting the same specific claim. A usual routine alone does not confirm a particular event. |
| Conflict between sources | Statements that differ about a detail. Check their timing and meaning before deciding they contradict. |
Cause and manner, used in the briefing
| Term | Meaning here |
|---|---|
| Cause of death | The injury or disease responsible for the death. |
| Manner of death | The category of circumstances: natural, accident, homicide, suicide or undetermined. |
| Natural | A manner involving disease. |
| Accident | A manner involving an unintended fatal event. |
| Homicide | A manner involving another person's action causing death; it does not itself decide criminal guilt. |
| Suicide | A manner involving a person's intentional action to end their own life. |
| Undetermined | The available evidence does not establish the manner. |
Matrix and lead terms, used in the notebook
| Term | Meaning here |
|---|---|
| Lead | A question or detail to investigate next. |
| Person of interest | Someone whose possible connection is being examined. This label does not establish responsibility. |
| Suspect matrix | A table for organizing possible connections and evidence for and against them. |
| Motive | A possible reason for an action. A suggested motive is not proof of an action. |
| Means | A possible way or ability to carry out an action. |
| Opportunity | A possible chance to carry out an action. |
| Claimed | Stated or suggested, with confirmation still needed. |
| Claim ceiling | The limit on what today's evidence allows you to conclude. |
| Cornell page | A notebook page with space for notes, questions and a summary. |
Case B word help
| Word | Meaning here |
|---|---|
| Auto-injector | A device that delivers one dose of a medicine. |
| Epinephrine | The medicine named in this case's device. |
| Register discrepancies | Differences between sales and cash records. |
| Hosting contract | An agreement to hold an event. |
Use these case terms to read the fictional records. Today's work asks for evidence organization, not diagnosis or emergency treatment.
Check before turning in
Your same submission contains the ten-entry O/I log, first timeline entries with sources, and the open question with its Part C explanation. Finish the existing sheet's other prompts too. The notebook organizers support this work; they are not extra uploads. No separate ethics paragraph, custody report or scene verdict is assigned.
What remains open
Today you may identify statements, compare sources, calculate a time gap and explain an unanswered question. You may not name the case's cause of death, manner of death or a responsible suspect. Carry your open question to the next scene walk and look for evidence that could answer it.
This is original John Hay practice supporting Activity 1.1.1, A Sketchy Scene. It does not complete the separate official PLTW activity; that work continues in myPLTW to the stopping point named in class.
Dispatch source script, Case B
This is the original fictional classroom script the recording was produced from. It has not been checked word for word against the audio, so treat it as a source script, not a verified transcript. The call is an evidence-reading scenario with invented people and places; it is not emergency-response guidance.
| Speaker | Words |
|---|---|
| OPERATOR | 911, what is your emergency? |
| CALLER | Hi, yes, I just got to work, Respawn, the gaming lounge in the plaza, and my boss is on the floor behind the counter and she's not responding. Please hurry. |
| OPERATOR | What is your name, and is she breathing? |
| CALLER | Marcus Nguyen, I'm the shift lead. I don't... no, I don't think so. Her face is really swollen. Dana has a bad peanut allergy, like, really bad, everybody knows. |
| OPERATOR | Is her epinephrine injector there? Can you use it? |
| CALLER | That's the thing, the drawer where it always is, it's open and it's empty. It's ALWAYS in the counter drawer. I don't understand. There's a shelf knocked over on her, there's a smoothie sitting right here. |
| OPERATOR | Units are on the way. Do not move her and do not touch anything on the counter. Time of this call is 7:16 AM. |