| Author | Message | ||
     McKevy |
I am trying to quantify the physical characteristics of what causes a "fingerprint." In other words, if one did a chemical analysis of the residue left on a surface after touching (and commonly known as a fingerprint) what would be the results? We know it is not an oil, per se, and we understand it to be approximately 99% water (with a complex mixture of amino acids, etc.) What sort of pH, HLB value, etc. are considered "standard" or "typical." Any advice or reference resource is greatly appreciated. Thank You. Kevin | ||
| Kasey Wertheim |
Scott, You could try toner from a copy machine or computer printer. Good luck! -Kasey | ||
| scott m |
Hello i am doing a science fair project on forensic science and fingerprinting. what i am doing is getting prints from classmates and then finding an objected touched by one class mate and fingerprinting it. what i need is some kind on substance i can use to dust for prints. i have used coaco but this doest work very well the print come up distorted. so if anyone has any ideas about what i could use and make sure i could get this easy at a store that would be great. If you have any replies post them here or e mail me at scottmartineau@rogers.com . this will help me alot in my project thank you very much!!! | ||
| Graham Ford |
To take this one stage further, if you develop a latent from the garbage that had previously been handled by the "homeless man down on the corner" and wish to plant this evidence at another location to implicate this person in a crime (takes a breath), there still remains the ultimate question of identity of the latent. The problem here for Heidi's paper is that you will not know if the developed latent (the one you intend to plant) belongs to the homeless man. You will need an inked set of prints of the man to undertake the comparison with the latent, to determine correct identity. Just because a person touched the item does not mean that; a) they will leave a print; b) that it can be successfully developed; c) subsequently identified. Without the aid on a fingerprint identification expert and a set of inked prints, you will not know the true identity of the latent that is being planted to fabricate the evidence. It could well be that the donor of the developed latent is one of the many persons who may have previously handled the piece of garbage (in this instance) prior to the person you intend to frame. Additionally, the latent to be planted should be placed on the receiving object in such a way, so as to appear that the latent was deposited in a normal manner for the handling of the said object. This cannot effectively be done if you are not aware of the identity of the latent, prior to the falsification of the evidence. This will present other problems of complicity, as other officers will be involved in generating the false evidence. Now, using the inked prints as a 1st generation image to commence the fabrication process using various media, is another matter, albeit no such easy task and will probably be seen as a fabrication by the expert. Regards - Graham | ||
| Kasey Wertheim |
Well, that explains a little more thoroughly why you would want such info. I would check out some books on trace evidence, study Dr. Edmond Locard, and consider why your teacher assigned this project. I think you might come across the idea that there IS no perfect crime! So how can you complete your project with this in mind? Perhaps come up with all the best examples you can, write it out as if to say "I wanted to...." and follow it up with "but I realized..." For example, "I wanted to forge the fingerprints of the homeless man down on the corner, but I realized even if I did obtain a piece of garbage with his fingerprint on it and managed to transfer that print onto an object at the crime scene, the latent print examiner could still tell it was a forged print." Then continue with that line of thinking. Who knows... maybe the teacher would be impressed. Regardless of how you do it, good luck! -Kasey | ||
| heidi |
I'm doing a project for my law enforcement class, we have to write out "the perfect crime" because in order to to catch a criminal, you have to put yourself in their place. i'm just looking at every possible solution. i plan to study forensics in university. | ||
| Kasey Wertheim |
I wouldn't! I think you are referring to fingerprint forgery, which would be "planting" someone's fingerprint on an item they didn't touch or at a location they have never been. There are several articles from a latent print perspective, but all the literature I have read and experiments I have conducted indicate that a forged latent print doesn't look like a regular latent print. There are unnatural wrinkles through the print, it's splotchy in appearance, etc..., and any competent latent print examiner would be saying to themselves "something is wrong here." SO... my question to you would be "Why do you want to?" | ||
| Heidi |
How would you go about grafting someone else's fingerprints on a piece of material. (taking it from a glass, then moving it to another object type thing) |
