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MPTC Criminal Investigations Study Guide 2024/2025
RESPECT model when conducting Criminal Investigations - ✔️✔️Respond and make it
safe, Emergency care for injured, Separate and remove people, Protect crime scene,
Evidence collection, Corroborate evidence with M.G.L., Take action/Testify,
Best practices securing Inner Perimeter - ✔️✔️Make at least TWICE the size of actual
crime scene, Clearly mark perimeters with line tape, Only allow authorized investigators
to the inner perimeter, ID pathway through inner perimeter that minimizes evidence
contamination, establish single entry and exit point, Establish crime scene log,
document all who go in and out, date/time in/out and reason
Best practices in establishing Outer Perimeter - ✔️✔️Staging area for support personnel
and equipment, Store equipment and supplies, have a log of equipment, assets, and
supplies.
Documenting the crime scene - ✔️✔️Rough Sketch- basic overview of the crime scene,
conducted after initial walkthrough, include date,time, not to scale, symbol legend,
relevant measurements and dimensions.
Photographing Crime Scene - Do not use personal camera or phone, photograph
evidence in natural state. Use a planned system to document, start with an overall
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perspective, then a midrange perspective, the close up of any evidence, injuries, serial
numbers or impression evidence, do not delete any photos or use editing software.
direct evidence - ✔️✔️Evidence that directly links a person to a crime without the need of
any additional evidence or inference
Circumstantial Evidence - ✔️✔️Evidence relies on a inference to connect a conclusion or
fact.
Physical Evidence - ✔️✔️tangible items that tend to prove some material fact; also called
real evidence
Testimonial Evidence - ✔️✔️It includes first-hand statements made by victims, witnesses,
suspects or police. MAy be direct or circumstantial.
exculpatory evidence - ✔️✔️evidence that suggests the defendant's innocence, or clears
them from the crime
relevant evidence - ✔️✔️Tendency to make a fact more or less probable than it would be
without the evidence
Reliable evidence - ✔️✔️That has not been tampered with and in substantially the same
condition as evidence originally seized by police when presented in court.
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