ASU And Fire

Question 1

What is acceptable packaging for fire debris?

Answer 1

Fire debris sampling bag (polymers)
Friction Lid Tin (FLT)
Glass vial screw cap

Question 2

Glass and paint acceptance criteria

Answer 2

Discussions have been had with SOC or IO
AND suspects known
OR
fBOE required and all control and recovered samples are submitted together and appropriately packaged

Question 3

What is the fire triangle?

Answer 3

Heat
Oxygen
Fuel
Required for a fire

Question 4

Two types of glass analysis

Answer 4

Physical fit (jigsaw)
Comparative analysis- compared based on thickness, colour, fluorescence and refractive index (RI)

Question 5

What are the types of glass

Answer 5

Glass from windows and doors
Vehicle
Container

Question 6

What do you need when glass sampling?

Answer 6

Need to collect 4 samples for control from different locations within the control glass source
Collect samples from all known broken sources
Don’t take from the ground

Question 7

How do you package glass?

Answer 7

In plastic screw cap vials
Can also place in paper/cardboard and place in heat seal plastic bag
Package all items separately (clothing)

Question 8

What are the coats of paint?

Answer 8

4- substrate on bottom
Primer
Surfacer
Basecoat
Clear coat

Question 9

What type of analyses on paint ?

Answer 9

Comparative analysis. Layer sequence, appearance, chemical composition

Question 10

Do you need a control sample for paint sample?

Answer 10

Yes need a control sample that is taken within close proximity to foreign sample

Question 11

What do you need when taking a paint sample ?

Answer 11

Need a full layer scrapping down to the substrate. Important for layer sequence comparison

Question 12

What is better a paint chip or smear?

Answer 12

Paint chip is better as it preserve the layer sequence. Has layer integrity.

Question 13

How do you package paint sample?

Answer 13

Need to package fragments in folded paper and place into container or CSPB

Question 14

GSR acceptance guidelines ? Samples not accepted when-

Answer 14

• SERT have been involved
• shooter made admissions to owning/ handling firearms
• secondary transfer
• over since hours since incident
• suicide and no letter from coronial support
• no one has previously loaded with ASU re exhibits and then being lodged

Question 15

What are the stages of fires?

Answer 15

Incipient
Growth
Flashover- not technically stage
Full room involvement
Decay

Question 16

Prior to entering a fire scene what do you need to complete?

Answer 16

PFS 96- harassed assessment form
Than attach to case file or examination summary

Question 17

What are the types of fire patterns?

Answer 17

V pattern
Inverted V pattern- may be flame impingement
U pattern- fire away from wall
Hourglass
Pour pattern

Question 18

Who analysis fire debris?

Answer 18

ASU