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Martin Grospkoff (Unregistered Guest)
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Posted From: cpe000cf17ac75c-cm00080d74404c.cpe.net.cable.rogers.com
Posted on Tuesday, January 15, 2013 - 05:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Hi,

I was robbed in the street (mugged), but i managed to get the criminal's prescription glasses. I handed them over to police and they said they would find prints within a week. It has been 3 weeks now and still nothing.

I live in a large metropolitan area and the local police force has it's own helicopter which they used to try and find the guy who robbed me. They were unsuccessful in apprehending him, so now it all rests on the glasses.

Thank you
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kirstyhughes (Unregistered Guest)
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Posted From: host86-154-21-92.range86-154.btcentralplus.com
Posted on Thursday, September 03, 2009 - 11:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Can you tell me if the police can tell the difference between an old fingerprint from about two months ago and a fingerprint that was taken three days after it touched the surface.

Webservant response: They cannot... please read below.
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Administrator (Admin)
Moderator
Username: Admin

Post Number: 17
Registered: 07-2006
Posted on Friday, October 31, 2008 - 07:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

From the FAQs of this site:

Can a Fingerprint Expert determine if latent prints are "fresh" versus old?
Estimates about the age of latent prints are unreliable when the experts guessing have no idea what was on the fingers that touched a surface. Latent prints that develop "quickly, strongly or dark" are not necessarily consistent with having been "recently" deposited. Unless scientific analysis of latent print residue on evidence was completed before processing with powder or chemicals to visualize latent prints (which is an analysis seldom performed because latent prints tend to be invisible until processed), then the nature of the latent print residue deposited by the fingers or palms cannot be known (whether it was fried chicken oil, grease, natural secretions from the fingers, etc.). Circumstantial evidence such as information that an item was cleaned thoroughly with glass cleaner, soap and water, etc., could date latent prints on the item as not being older than the last thorough cleaning.
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Sara Mickey (Unregistered Guest)
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Posted From: c-71-57-66-141.hsd1.il.comcast.net
Posted on Saturday, October 25, 2008 - 08:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Hi. I had an officer tell me that my prints were on the outside of a car near where a vandal performed some damage. This car was my ex-boyfriends who let me borrow it from time to time, so yes my prints would be over it. however we broke up around a month ago. officer told me that this doesn't matter and that he dusted and he could date the print to within a week based on freshness of the print.

I've read the FAQ regarding dating but not sure if it applies to my problem. The print was on the outside of a car so I imagine environment can play a drastic role in dating.

The officer called me to come in to answer some questions. i was not under arrest and could walk out any time. for an hour he tried to become my friend and then get me to say i did the damage. however the entire time i was freaking out that i borrowed the car a month before!!

Can they really date prints or was he blowing smoke at me? What are my options should they arrest me?

Help!

Webservant Note: If the officer who determined the "age" of your latent prints on the vehicle has some special skills (or ESP) that allows him to determine fresh prints from old prints, please invite him to author a paper for the Journal of Forensic Identification to enlighten the rest of the world... because for the past 100 plus years, science has failed to develop a reliable protocol for determining old versus new latent prints based on their appearance when developed by any method.

...or he could have been attempting the art of subtle persuasion by showing sympathy and working hard to gain your trust, and then bluffing (lying) about your prints being on a surface in incriminating circumstances, to see if you would admit guilt.
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laila isabella (Unregistered Guest)
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Posted From: 60.53.249.72
Posted on Tuesday, July 22, 2008 - 05:15 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

most fingerprints which save in the database are all from known convicted.what about unknown suspect?how do the police detect those 'never convicted before'?
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TomDuncan (Unregistered Guest)
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Posted From: 24-236-251-161.dhcp.aldl.mi.charter.com
Posted on Saturday, May 05, 2007 - 09:59 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Webservant note: At the Frequently Asked Questions in this website, please click on the link labeled "How long do fingerprints last on evidence" ...also see "Can a Fingerprint Expert determine if latent prints are 'fresh' versus old."

How long can a fingerprint last on plastic if exposed to rain?
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angelo john doherty (jamesdoherty)
Member
Username: jamesdoherty

Post Number: 1
Registered: 11-2006
Posted on Saturday, November 18, 2006 - 05:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Webservant note: At the Frequently Asked Questions in this website, please click on the link labeled "How long do fingerprints last on evidence" ...also see "Can a Fingerprint Expert determine if latent prints are 'fresh' versus old."


hello i was arrested lately for finger print found on a glass window that was removed from a door to gain entry to a flat . wat i want to know is . how long can a print syay on glass as this flat was in a buildin . 3 flats in all . the only reason my print was there is i helped my sister move furniture september 03. still i was charged . and im now pending a court appearance very soon . which i hope will be with drawn . i was charged they didnt check to see if my sister even lived at the address .i was charged any way. john. dated this 18th nov 06

(Message edited by member on November 18, 2006)
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Brian Jackson
Posted on Tuesday, November 07, 2000 - 06:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

how long do prints stay on a car?
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Ed German
Posted on Sunday, October 29, 2000 - 03:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Fingerprints have been developed on porous surfaces (papers, etc.) forty years and later after their deposition. On non-porous surfaces, they can also last a very long time. The nature of the matrix of the latent print will often determine whether it will survive environmental conditions. For example, a greasy print on a piece of glass may survive months under water, or many decades in a basement.
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Jerry Childress
Posted on Monday, October 23, 2000 - 04:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

It is unknown how long a print will remain on an object, because many factors come into play. One of the main factors is the environment in which the print exist, although modern technology is helping with this problem. I have read where prints have been taken off of well preserved artifacts, so you never know.
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joe nisk
Posted on Tuesday, September 05, 2000 - 07:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

how long do finger prints last on an object?
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Craig Dunsby
Posted on Monday, March 11, 2002 - 08:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

how long do fingerprints last on steel, plastic and wood?
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Kasey Wertheim
Posted on Monday, March 11, 2002 - 08:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Joe and Craig,

How long a fingerprint will last on any given surface depends on several factors. First, the "Matrix" of the print, or the contaminant or substance that was deposited from the finger plays a role. Most latent prints are composed of sweat or a sweat-oil mix from the glands of the body. But some prints can be composed of other substances, such as blood, grease, dust, etc... Even with natural residue, the percentages of the types of sweat in any particular latent print is unknown, and therefore the length of time it will remain on a surface cannot be determined. The second factor is the substrate itself, or the surface on which the print is deposited. Some surfaces, like glass or metal, receive and hold prints well, whereas some types of plastics may receive a print well, but the detail will diffuse only after a day or two. The third, and perhaps most detrimental factor dealt with in the collection of evidence, is the environmental factor. This includes temperature and humidity, which interact to produce a variety of effects on a print residing on any surface. Further, most consider the handling of the item to fall under this category, which plays a very large role in how long a print will remain intact on an object. In real life, all three factors act on a latent print, and the combination of all these elements determine the longevity of any particular print. It becomes easy to see how fragile this type of evidence is, and reminds us that latent prints truly are "chance" impressions.

-Kasey

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