CSA 1 - Cast Footwear Impressions

Impression casts r done by who?

Trained professional 4 technique

2 document footwear impression cast, properly photo impression b4 what?

Casting

Evidence Label:

Label object container w/ initials, ID #, date, time, evidence #, locale, description

Evidence #:

Each impression has unique # 2 mirror evidence placard #

Evidence description:

Cast item type/locale, impression orientation 2 north, 2 impression object, nearby object

2 cast footwear impression evidence, 4 cast be prepared 2 act what?

Quickly/methodically

2 cast footwear impression evidence, 4 tire impression casts cast what?

A lot of the tire cast

2 cast footwear impression evidence, use dental stone 2 cast in what?

Dirt, soil, sand, snow, but sulfur r also used 4 snow

2 cast footwear impression evidence, what r impression coat materials?

Snow print wax, stabilizers (hairspray), highlighters (paint), but conditions vary

2 cast footwear impression evidence, casts r marked w/ what?

Impression identifier, general evidence collection info (date, case #), directional indicator

2 cast footwear impression evidence, cast materials should be allowed 2 what?

Harden b4 surface removal

2 cast footwear impression evidence, prepare cast material w/ what?

Manufacturer’s instructions

2 cast footwear impression evidence, sturdy plastic bag r used 4 what?

Mixing dental stone 4 footwear impression/bucket useful 4 tire track cast mix material

2 cast footwear impression evidence, initial pour of casting material should what?

Occur off impression 2 avoid detail damage since cast material should flow in impression

2 cast impressions w/ dental stone in soil/sand, prepare impression 4 what?

Casting (4 fragile impression cast apply fixative, care should be used 4 applying fixative 2 lower impression damage), but 4 dense soil casts apply release agent 2 lower impression damage

2 cast impressions w/ dental stone in soil/sand, add certain water amount 2 what?

Pre-measured dental stone amount, average footwear impression requires 2 lbs dental stone/10 ounces water, water amount required varies based on cast product, mixture result has heavy cream vicosity and should be adjusted 2 achieve texture

2 cast impressions w/ dental stone in soil/sand, mix continuously 4 how long?

3-5 minutes 4 powder 2 absorb water

2 cast impressions w/ dental stone in soil/sand, pour cast material outside what?

Impression perimeter/direction impression flow, but ensure impression filled/covered evenly

2 cast impressions w/ dental stone in soil/sand, what occurs w/o easy flow?

Top cast material surface 2 help flow, cast should be good thickness 2 avoid break

2 cast impressions w/ dental stone in soil/sand, additional cast material can be what?

Poured on OG cast top 2 complete cast/add thickness

2 cast impressions w/ dental stone in soil/sand, fragile/shallow impression:

Pour cast material from outer perimeter 4 rapid impression flow, thin cast mixture good 4 method, avoid direct pour on uncovered impression

2 cast impressions w/ dental stone in soil/sand, lg dental stone amount r mixed in bucket 4 what?

2 cast

2 cast footwear impression, sulfur:

Snow impression r cast w/ sulfur, but there needs 2 be speacial training 4 use

2 package cast footwear impression, collect/package debris that fell from what?

Cast removal

2 package cast footwear impression, store packaged debris w/ what?

Cast

2 package cast footwear impression, don’t clean what?

Cast

2 package cast footwear impression, package debris in what?

Bindle/container 2 store it, label container w/ name/ID #/date/time → place cast inside, but use shock absorbing/protective materials 2 cushion cast

2 package cast footwear impression, cast is what?

Delicate/damageable, pack cast 2 stable/secure it 4 impression 2 be face up/protect 4 transport from impression damage

2 package cast footwear impression, what occurs if cast 2 lg 2 box?

Wrap in clean paper/shock resistant material (bubble wrap), seal impression/protect from damage during transport

2 package cast footwear impression, never discard cast regardless of what?

Condition during impression removal, save/submit casts 2 lab, even submit broken cast 4 exam process

2 package cast footwear impression, close/seal labeled container w/ what/

Evidence tape seal w/ initials, ID #, date, time

2 package cast footwear impression, make sure labeled container includes what?

Item cast description w/ initials, ID #, date, time, locale, evidence #