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Topic: Gun in concrete? (Read 13463 times)
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Matthew R. White
AFTE Member
Posts: 9
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Gun in concrete?
«
on:
April 19, 2021, 07:57:04 AM »
I have a recent case involving evidence within concrete. Has anyone had a similar situation?
Any policy / procedure you lab utilizes? I would welcome some recommendations
«
Last Edit: April 19, 2021, 01:56:45 PM by Matthew R. White
»
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Matthew R. White
Firearm / Toolmark Examiner
BCI&I Laboratory
1560 State Route 56 SW
London, OH 43140
Email: Matthew.White@ohioattorneygeneral.gov
Phone: 740.845.2528
Fax: 866.498.3908
Gary Lind
Gary M. Lind
AFTE Member
Posts: 77
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Re: Gun in concrete?
«
Reply #1 on:
April 19, 2021, 08:43:02 AM »
See this thread along with the attachments from Bexar County
http://forum.afte.org/index.php?topic=12996.msg69992#msg69992
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"Better to have a gun you don't need than have a need for a gun you don't have"
Connor Smith
AFTE Member
Posts: 12
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Re: Gun in concrete?
«
Reply #2 on:
April 19, 2021, 09:51:24 AM »
I worked a case recently with a firearm in concrete. I was able to remove the majority of concrete from the exterior of the firearm using dental picks. Slow process, but it worked. I was able to get the firearm field stripped with this method and a little help from an ultrasonic cleaner. I used a concrete dissolver (link below) to assist with removing concrete from the barrel and portions of the slide after disassembly. Did some practice with reference firearms before using the product/method on casework. Consistently had success with identifying breech face marks, less success with bullet comparisons. Concrete can be pretty abrasive, especially in a softened condition. I am in the process of writing up an AFTE article on the topic, but it is not done yet.
https://www.sakrete.com/products/concrete-dissolver
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