Process the Scene: review the intake records

Friday's case work practiced keeping a source beside each statement. Today, use that rule to organize the supplied records. You are reviewing a classroom simulation. You are not collecting samples or testing a stain.

An intake record lists an item, its location, its photo references, and who handled it. An E-number is the evidence number used to track an item. Keep the number supplied. If none is assigned, say so. Do not make one up.

A reference point, or RP, is a named place used to describe a location. Keep both distances and their units. Chain of custody is the record of who handled an item and when. In today's collected-item records, the custody row starts when the item is bagged. An item left in place needs its true status, not a made-up transfer.

Latent means not readily visible under the conditions being used. An alternate light source uses selected light to help make some material easier to see. Fluorescence means a material absorbs light and gives off light. The supplied classroom records describe a fluorescent visual model.

Luminol is different. It produces light through a chemical reaction. The classroom model does not reproduce that test or identify a substance. It helps us practice describing a response without naming its cause. [Sources S1 and S2]

A presumptive test is an initial check that may suggest a substance is present but does not identify it conclusively. Some chemical screens can respond to bleach or copper. These are examples of interference, not claims about the contents of our case items. Repeating initial screens does not itself establish identification. [Sources S3 and S4]

A visible response can be misleading if another material caused it. A missing response can also mislead if the material was not detected under the viewing conditions. Write what was reported. Do not turn “no response observed” into “nothing was present.” [Sources S1, S3 and S4]

“No UV photograph supplied” describes a missing image reference. “No UV hit” describes a reported observation. They are different. Copy the status the record actually gives. If a record says only “no UV,” copy those words and add “meaning not specified.” If UV is not mentioned, write “UV status not supplied.” Do not change either into “no UV hit.” You do not need to open an unavailable photograph for this record exercise.

For a reported glowing area, write that the supplied record reports fluorescence, then name the recorded location and photo reference. The material remains unconfirmed. A stronger identification needs a method appropriate for the material and its actual result. You do not need to name or perform a test. [Sources S3 and S4]

Fragile means easily damaged or lost. Time-sensitive means delay could change the item. The supplied case record groups the items into four collection priorities. Use those groups to explain the recorded order. The groups are not a replacement for the full intake list.

In laboratory work, a comparison is useful only when its role is clear. A comparison item is an item used to compare with another. A seal describes packaging; it does not establish the contents as clean. A control is used to check how a test or comparison performs. [Source S5]

The strongest statement today preserves what the source reports and what remains unknown. An observation by itself does not identify a person, substance or cause.

Follow MODEL-1 before starting Part B. Notice how its source, location, photo references and custody status stay together. Then use your own case's records for your sheet. Keep that sheet for Tuesday's trace-comparison work.

All three cans open and empty. Glucose meter powered off, screen intact, no visible damage.

The supplied classroom simulation record reports: Two hits: the console corner and a floor smear near the head end of the outline. Nowhere else in the room fluoresced. Both hits were photographed under UV with a scale, then under white light, before swabbing.

The report describes what was observed under those conditions. It does not establish that no material was present elsewhere.

Every bag has a row; every row has a released-by and a received-by. Six rows opened today.