| Author | Message | ||
     debbiemilam (Unregistered Guest) Unregistered guest Posted From: 68-191-108-117.dhcp.dctr.al.charter.com |
I was robbed in my home. He shoved me and I shoved back. I had in my hands a plastic jar of peanut butter and a butter/kitchen knife. I also had my glasses in my hands. I was told by the police officer reporting the incident that those items would not be appropriate for fingerprint evidence due to the type of surface. The jar is smooth not textured. Please advise if this is true. I believe that it is possible. | ||
| Ernie Hamm |
There are studies on techniques for developing latent prints on skeletal material and similarly textured surfaces with powder processing. The posted comments of T.A. Smith in May 2002 are applicable to the recovery of latent prints on bone, which is just another form of textured surface. I would lean toward the use of a silicone rubber compound for lifting a print from bone if its surface is fairly irregular. | ||
| mdayhawk |
Can a fingerprint be lifted off of bone? If so how? | ||
| T.A.Smith |
"Sedr.." A fingerprint on a textured surface - such as the plastic of your vehicle's glove box - can be lifted by one (or more) of the following techniques after being appropriately photographed in-situ on the object that the print was initially found... a) apply clear adhesive tape across the surface of the print with sufficient "working" of the tape with your fingernail to allow it to conform with the texturing of the surface - remove the tape and apply it to another surface. We use glossy paper, usually white. Voila - the print has been transferred and is now more portable than the glove box it was once on. b) prepare and apply a casting material in liquid form carefully across the surface where the print is located. We use compounds called "Mikrosil" or "dental stone". When the mixture "sets" it can be removed and the print can be viewed on the bottom side of the cast. The substance used should be of contrasting colour with the fingerprint powder so the print is easily viewed. This technique has the inherent problem of producing a "sdarwkcab" - that's backwards or "laterally incorrect" print which needs photo or computer flipping prior to comparison with a known exemplar. c) if you're just doing this at home with your kids, a piece of "Silly Putty" would do the trick...or some children's glue. I trust this is what you were seeking. | ||
| sedrgeidonfordcrow |
how can they do that? | ||
| Kasey Wertheim |
Sean, Sure... crime scene technicians and latent print examiners do that very thing all over the country on a daily basis. Of course, on any particular item there are a host of variables that determine whether or not an identifiable latent print will be left. There are several other discussions in this forum that address those factors. -Kasey | ||
| sean |
Is it possible to lift fingerprints off textured surfaces, namely plastic. |
