Presentation is loading. Please wait.

Presentation is loading. Please wait.

CRIME SCENE DOCUMENTATION AUGUST 21 2014. CRIME SCENE SEARCH PATTERNS Investigators often use geometric search patterns while searching for evidence to.

Similar presentations


Presentation on theme: "CRIME SCENE DOCUMENTATION AUGUST 21 2014. CRIME SCENE SEARCH PATTERNS Investigators often use geometric search patterns while searching for evidence to."— Presentation transcript:

1 CRIME SCENE DOCUMENTATION AUGUST

2 CRIME SCENE SEARCH PATTERNS Investigators often use geometric search patterns while searching for evidence to ensure that no evidence is missed. The type of search pattern depends on the scene.

3 CRIME SCENE SEARCH PATTERNS

4 Grid search patterns are very effective, but very time consuming

5 CRIME SCENE SEARCH PATTERNS Rarely used Doesn’t work well with physical barriers. Sometimes used when only investigator present.

6 CRIME SCENE SEARCH PATTERNS Works well in large, outdoor areas. Often involves volunteers.

7 CRIME SCENE SEARCH PATTERNS Works well in buildings and with warrants searches.

8 CRIME SCENE SEARCH PATTERNS Think about the following, but DON’T say the answer out loud. When I ask, show me the correct answer with your fingers. Investigators believe a body may have been dumped in a large field. What search pattern be used? 1)Spiral 2)Grid 3)Parallel 4)Zone

9 CRIME SCENE SEARCH PATTERNS Think about the following, but DON’T say the answer out loud. When I ask, show me the correct answer with your fingers. Investigators believe a body may have been dumped in a large field. What search pattern be used? 1)Spiral 2)Grid 3)Parallel 4)Zone How do you know?

10 CRIME SCENE SEARCH PATTERNS Think about the following, but DON’T say the answer out loud. When I ask, show me the correct answer with your fingers. A very high profile crime has been committed, and the police has been given a lot of resources and manpower to solve it. Which pattern is appropriate? 1)Spiral 2)Grid 3)Parallel 4)Zone

11 CRIME SCENE SEARCH PATTERNS Think about the following, but DON’T say the answer out loud. When I ask, show me the correct answer with your fingers. A very high profile crime has been committed, and the police has been given a lot of resources and manpower to solve it. Which pattern is appropriate? 1)Spiral 2)Grid 3)Parallel 4)Zone How do you know?

12 CRIME SCENE SEARCH PATTERNS Think about the following, but DON’T say the answer out loud. When I ask, show me the correct answer with your fingers. Police have a warrant to search a suspect’s car. Which pattern is appropriate? 1)Spiral 2)Grid 3)Parallel 4)Zone

13 CRIME SCENE SEARCH PATTERNS Think about the following, but DON”T say the answer out loud. When I ask, show me the correct answer with your fingers. Police have a warrant to search a suspect’s car. Which pattern is appropriate? 1)Spiral 2)Grid 3)Parallel 4)Zone How do you know?

14 CRIME SCENE NOTES Investigators take detailed notes on all of the following:  Step-by-step description of every action taken by investigators.  Date, time, location, weather, environmental conditions  Description of crime  Location of evidence with reference to other fixed points  Names of all people on the scene, including authorized personnel, witnesses, victims

15 EXAMPLE NOTE 1 What types of info do you see?

16 EXAMPLE NOTE 2 What types of info do you see?

17 CRIME SCENE PHOTOS The scene should be thoroughly photographed before evidence collection. Types of photos: overall scene (exterior and interior) midrange photos close up Use scales and placards with photos Start with the larger, exterior scene, and move interior and towards finer detail.

18 PHOTO EXAMPLE 1 WHAT TYPE OF PHOTO IS THIS? WHAT OTHER PHOTOS SHOULD BE TAKEN?

19 PHOTO EXAMPLE 2 WHAT TYPE OF PHOTO IS THIS? WHAT ELSE WOULD BE USEFUL IN THIS PHOTO?

20 CRIME SCENE VIDEOS Crime scenes should be videotaped starting outside and moving in, all around the crime scene. Important details (time, place, and objective descriptions should be included, Other narration should be avoided. Should not include members of the investigative team. Watch me!

21 CRIME SCENE SKETCHES Rough sketches are done on the scene, and finished sketches are completed later. Crime scene sketches should be labeled with:  A title  A legend with letters, etc., for key pieces of evidence  Compass direction  Whether to scale, and if so, what scale  Case number  Offense type  Location

22 DISCUSS WITH A PARTNER: HOW DO THESE DIFFER?

23 CRIME SCENE SKETCHES There are 3 basic methods for taking measurements: 1.Triangulation 2.Baseline 3.Polar Coordinates

24 CRIME SCENE SKETCHES There are 3 basic methods for taking measurements: 1.Triangulation 2.Baseline 3.Polar Coordinates In triangulation, you measure the distance of each piece of evidence from 2 fixed points

25 CRIME SCENE SKETCHES There are 3 basic methods for taking measurements: 1.Triangulation 2.Baseline 3.Polar Coordinates In triangulation, you measure the distance of each piece of evidence from 2 fixed points Evidence Fixed point Y Fixed point X

26 CRIME SCENE SKETCHES There are 3 basic methods for taking measurements: 1.Triangulation 2.Baseline 3.Polar Coordinates With baseline, you create a line between two fixed points and measure the distance of the evidence from a right angle to the line Evidence Fixed point Y Fixed point X

27 CRIME SCENE SKETCHES There are 3 basic methods for taking measurements: 1.Triangulation 2.Baseline 3.Polar Coordinates With polar coordinates, you measure the distance and compass direction of evidence away from a wall Evidence Wall X 48 o NE

28 SKETCHES – WE DO & YOU DO We will make a rough, to-scale sketch of the room using graph paper. 1)Be sure to leave room for a legend, title, etc. 2)Measure room and create scale 3)Place boundaries & fixed points on sketch 4)Use each method to sketch one piece of evidence 5)You Do – Use each method to add in 3 more pieces of evidence 6)You Do – Complete legend

29 HOMEWORK – ENJOY YOUR WEEKEND! Closure - How did Exit Ticket – Be sure your LEGEND is complete and turn in your sketch


Download ppt "CRIME SCENE DOCUMENTATION AUGUST 21 2014. CRIME SCENE SEARCH PATTERNS Investigators often use geometric search patterns while searching for evidence to."

Similar presentations


Ads by Google