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Crimebusters

Division: B – Middle School

NC Essential Standards Alignment: 6.P.2, 8.P.1, Science as Inquiry

Event Rules: See National Rules

Event Score Sheet: None

National Event Page: Here

Required Materials:Students must bring and wear goggles, an apron or a lab coat, and have skin covered from the neck down to the wrist and toes. Gloves are optional; but if a host requires a specific type, they must notify teams. Pants should be loose fitting; if the host has more specific guidelines they will notify teams in advance of the tournament. Shoulder length hair or longer must be tied back. Students who unsafely remove their safety clothing/goggles or are observed handling any of the material or equipment in an unsafe manner will be penalized or disqualified from the event.

Clarifications:UPDATED 12/4/19 NC Only: 3. NC regionals will only be focusing on parts

3.c.i. (Qualitative Analysis of solids)

c. iii. (Liquids)

3. d. iii. (Recyclable Plastics)

3.f. i (Fingerprints)

f. iv. (soil)

There will be no mixtures at regional tournaments. Other topics listed in the rules will not be addressed at regionals, but MAY be covered at the state tournament. Additional questions may be asked on general lab safety and procedure and chemical and physical properties and common uses of the substances in part 3.c.

For the Chemistry events, it states that teams may bring any or all of the items listed – are teams only permitted to have the checked items in their kits?  Or, may they have all items on the list even if they are not checked.

 
Teams may bring anything on the list whether it is checked or not.  The list is to help teams pare down the list a bit.
 
The chemistry events now say the reference sheets MAY be sealed in a sheet protector or laminated. Do they have to be?
 
No, The difference between MAY and MUST is a big one in Olympiad.  Since this set of rules says “MAY be in a sheet protector”  – it means that it doesn’t have to be, but it is allowed if you want to use one.
 
updated 10/11/2019

Description:

Given a scenario, a collection of evidence, and possible suspects, students will perform a series of tests. The test results along with other evidence will be used to solve a crime. updated 9/26/2018

Materials:

Teams MUST bring chemical splash goggles, safety gear, and a writing instrument. Teams may also bring spot plates, test tubes and test tube holders or any containers in which they can perform the tests, popsicle sticks, spatulas, plastic spoons, etc. for handling materials, pH paper, a ruler, hand lenses or loupes, paper towels, a disposable cup for solid waste, writing instruments, 1 sheet of paper per person with information in any form from any source. Sheet protectors are encouraged. Each team may bring any or all of the items listed as Recommended Lab Equipment for Division B Chemistry Events, posted on soinc.org. Students not bringing these items will be at a disadvantage. The supervisor will not provide them. Teams may bring only specified items. Other items not listed, including calculators, are prohibited. The event supervisors will check each team’s equipment, confiscate non-allowed items, and have the right to penalize the team up to 10% if additional equipment is brought to the event. updated 9/11/2018

***SAFETY ISSUE*** In addition to OSHA approved chemical splash goggles with indirect vents, teams also MUST wear closed toed shoes, pants/skirts that cover legs to the ankle, AND a lab coat/apron that reaches below the knee or they will not be allowed to participate. Long hair must be tied back. In addition, any teams seen handling materials in an unsafe manner will be disqualified from the event. ***SAFETY ISSUE***

Event Leaders will provide a proper lab environment, all evidence to be tested, additional equipment necessary to perform tests on the evidence, the official test and answer sheet.

Scoring:

High score wins. Points are earned for proper identification of evidence as well as analysis of the crime. Ties will be broken by the best Qualitative Analysis (3.a.) score.  The only category that we aren’t covering in NC at Regionals is Part E, Chromatography for 5%, and since percentages are approximate, those points will end up distributed in other sections where it makes sense.

Common Mistakes:

– Be sure to follow all safety requirements! Safety issues will NOT be arbitrated.

– Event leaders will not answer questions on testing procedures (for example- how to perform a burn test on fibers) nor will they provide a copy of the rules or a list of the possible unknowns. Teams should already know procedure, and should include a list of the possible unknowns in their allowed notes if they cannot remember. Event leaders WILL answer safety questions, and stop students from performing a test in an unsafe manner.

Recommendations:

None

Event Resources:

Crimebusters 2018 Coaches Clinic Presentation (2019 Rules)

Powder Analysis blank chart
Sample Forensics Flowchart
2017 Coaches Clinic Presentation

General sites on Forensics and Crime Busters
Forensic checklist of links, activities, and notes
http://php.indiana.edu/~lwoz/socrime/index.htm
Real World—Articles on aspects of crime scene data collection
Links to forensic activities for students

Polymers and Fibers:
Microscopic Images of Fibers—search for the types of fibers and select the kind of microscopic technique for the image you want.
Animal Hair Images

Chromatography:
Intro to Chromatography
How to calculate the Rf value for a chromatogram
Tutorial on Interpreting Mass Spectra
Mass Spectrometry 
Basic info Mass spectroscopy

Blood Information:
Blood Spatter info
Electropherogram info

Shoe and Tire Prints
Lab activity on shoe and tire prints

Sample Events:

2014 State Forensics Test – powders, toolmarks/impressions, firearms/ballistics
2010 Regional Forensics Test- Stolen Steelers
2010 Crimebusters Regional Test
2013 Crimebusters State Test
2014 Crimebusters State Test

Wright Center for Science Education Sample Events

Media:

None