The definitive cause of death for the victim in the FORENSIC - M.E. Protocol playground case is accidental poisoning, specifically by ingesting a cleaning detergent. While the scene presents several misleading clues pointing toward violence or a fall, the chemical analysis of the victim's blood and a strange blue liquid found nearby are the keys to cracking the case and achieving the S-rank.
This first real investigation after the tutorial is designed to test your ability to look past the obvious and trust your instruments. The game deliberately stages the scene to suggest a physical altercation or a fatal accident, but only by methodically collecting and analyzing every sample can you uncover the tragic, non-homicidal truth.
What is the Official Cause of Death?
The final verdict you must submit is Death by Poisoning. More specifically, the victim, a young woman, ingested a powerful cleaning detergent. The critical evidence is the chemical match between the blue liquid found in a bottle near the body and the toxins isolated from the victim's blood sample during analysis in your van. The game's logic requires you to connect these two pieces of evidence in the final summary to close the case correctly.
Many players initially suspect homicide due to the presence of a man's fingerprints on a nearby bottle or assume the cause was a fall from the playground equipment. These are intentional red herrings. The core lesson of Case 1, "The Playground," is that not every death is a murder. Your job is to reconstruct the event based purely on physical evidence, and in this instance, the science points to a tragic accident or potential suicide, but not a homicide.
Analyzing the Crime Scene: All Key Evidence
To achieve a Grade S rating, you cannot miss a single piece of evidence. The playground is littered with items, but only a few are critical to establishing the cause of death. Your first step upon arriving should always be to deploy your aerial drone for an overview and then meticulously photograph and mark every piece of potential evidence before touching anything.
Here is the complete list of essential evidence you must collect:
- The Victim's Body: Photograph from multiple angles before interacting further.
- Blood Sample: A sample taken from the victim is necessary for toxicological analysis.
- Victim's Mobile Phone: Contains contextual information but is not determinative for the cause of death.
- Victim's ID Card: Establishes identity.
- Blue Liquid/Stain: Found near the body. You must take a sample using a sterile cotton swab.
- Discarded Bottles: Several alcohol bottles are present, but one contains the residue of the blue detergent. This is the source of the poison.
- Fingerprints: You will find a man's fingerprints on one of the bottles. While you should collect and analyze them, they ultimately belong to a person not involved in the death, serving as a classic red herring.
Infographic showing key evidence at the playground crime scene.
Unraveling the Timeline: From Arrival to Analysis
FORENSIC - M.E. Protocol is punishingly methodical. Deviating from proper procedure will tank your score. Follow these steps precisely to ensure you gather all necessary data without contaminating the scene.
Step 1: Initial Scene Documentation
Before you even step out of the van, use your aerial drone to get a high-angle layout of the scene. This helps you spot evidence clusters without risking contamination. Once you approach, your first actions should be purely observational. Use your camera to photograph everything from a distance: the body, the bottles, the ID card, and the blue stain. Place evidence markers next to each item after photographing them in their original state.
Step 2: Sample Collection
This is where most errors occur. You can only carry two tools at a time, forcing you to make multiple trips back to the van.
- Equip sterile swabs and sample tubes. Approach the victim's body and the blue stain. Use a swab to collect a sample of the blue liquid. Use a separate kit to draw a blood sample from the victim.
- Equip the fingerprint kit. Go to the bottle that your instrument panel indicates has prints. Apply the dust, then use the tape to lift a clean print.
- Bag physical evidence. Collect the ID card, phone, and the bottle with the blue residue. Each must be bagged separately.
Step 3: Mobile Lab Analysis
The heart of the case happens in your van. You must process the collected samples to get the data needed for your conclusion.
- Run the Blood Sample: Insert the victim's blood vial into your chemical analyzer. The report will come back showing the presence of a specific, highly toxic chemical compound found in industrial cleaners.
- Run the Blue Liquid Sample: Analyze the swab from the blue stain. The machine will identify it as the exact same detergent found in the victim's blood.
- Run the Fingerprints: The database will match the print to a male individual with a minor criminal record, but no other evidence will link him to the scene at the time of death. This is the dead end.
Annotated diagram of the chemical analysis machine.
Submitting the Verdict: Connecting the Dots
Once all evidence is analyzed, open your tablet to the case resolution screen. This is where you build the logical chain that proves your conclusion. The interface shows all collected evidence as nodes that you must connect.
To solve the playground case, you must create the following chain:
- Link
Blood Sample AnalysistoVictim's Body. This establishes the presence of poison in the deceased. - Link
Blue Liquid Analysisto theDiscarded Bottle. This identifies the source of the poison. - Crucially, link
Blood Sample Analysisdirectly toBlue Liquid Analysis. This creates the undeniable scientific match, proving the substance from the bottle is what killed the victim.
Once these links are made, you can select the final cause of death. Choose Poisoning. The manner of death is best classified as Undetermined or Accident, as there is no evidence to support homicide or suicide definitively. The game rewards you for not overreaching your conclusions. Sticking to what the evidence proves is the path to an S-rank.
Comic grid showing the steps to get an S-Rank on the case.
Playground Case FAQ
A quick-reference guide to the most common questions about the playground investigation.
Was the victim pushed from the slide?
No. While the body's position might suggest a fall, the autopsy data in your report (accessed via the tablet) shows no signs of significant blunt force trauma consistent with a fatal fall. The primary cause of death is chemical, not physical.
Who do the fingerprints on the bottle belong to?
The fingerprints belong to a male individual in the police database, but he is a red herring. No other evidence places him at the scene or connects him to the victim. Concluding he is a suspect will lower your case score.
Do I need to analyze the alcohol bottles?
Yes, you need to examine them to rule them out. Your chemical analyzer will confirm they contain ethanol, which is distinct from the industrial detergent that caused the death. This act of negative confirmation is part of thorough police work and contributes to a higher grade.
What happens if I choose the wrong cause of death?
Submitting an incorrect conclusion, such as homicide or accidental fall, will result in a low grade (C or D) and a reprimand from your supervisor. You can replay the case at any time to correct your findings and improve your score.
The Final Analysis
The playground case in FORENSIC - M.E. Protocol is a masterclass in the game's core philosophy: science over speculation. It forces the player to abandon assumptions and trust the data generated by their tools. The scene is dressed up to look like a potential murder, but the cold, hard chemistry reveals a more mundane, though no less tragic, reality. By correctly identifying the cause of death as poisoning from a cleaning detergent, you demonstrate your grasp of the fundamental mechanics and are ready for the more complex cases that lie ahead.