Eryn Russell (Unregistered Guest)
Posted From: proxy3.eq.edu.au
|Posted on Wednesday, October 24, 2007 - 06:12 pm: ||
Im doing a project at school and i need to know why they use ink to take fingerprints.....thanks
Post Number: 210
|Posted on Friday, January 12, 2007 - 07:00 am: ||
You asked: I had my house broken into and I do not know how the police use the finger prints to find the suspect. Although they did not take any from myself or my fiance. How will they determine the fingerprints.
Often, police do not collect inked fingerprints from victims at the same time evidence is collected from a crime scene. Police in most jurisdictions have access to a variety of local/regional/national/international fingerprint databases through direct or indirect (snail mail) connectivity. How quickly scientific work is completed and what fingerprint databases are searched depends primarily on the importance of the investigation.
Practices vary between police agencies insofar as collecting inked finger and palm prints from victims and other persons known to have touched evidentiary surfaces. Such prints are often referred to as "elimination prints" and they can preclude wasting resources seeking the identity of criminals from impressions deposited by victims.
In some jurisdictions, police personnel may use a portable kit to collect inked prints from victims at the same time they collect latent print evidence. In other jurisdictions, elimination prints are not collected until laboratory examinations determine that identifiable latent finger or palm prints are present on evidence (and such examinations may take days, weeks, months or years to complete).
In decades past, when automated fingerprint identification system (AFIS) resources were much more time-consuming, expensive and scarce than now, some agencies would not "search" latent prints from "crime against property" investigations (crimes where victims were not threatened in-person or attacked) in AFIS databases until after investigators collected elimination prints enabling exclusion of innocuous impressions depostied by victims, witnesses, etc.
In modern times, whether or not elimination prints are collected from victims tends to vary greatly depending on multiple circumstances, including what other crime scenes are waiting to be processed, and local policies regarding whether elimination prints are always sought before launching searches against databases of known criminals.
Most police agencies have access to a variety of criminal fingerprint databases, including automated comparison of unsolved crime latent fingerprints against other unsolved crime impressions. More progressive agenices have systems capable of automated searches involving palmprints as well.
For important investigatons today in many American jurisdictions, it would not be difficult for a police agency to have technicians process a crime scene at 6 AM, turn-in evidence to their local laboratory at 8 AM, and potentially know the identity of the criminals who made visible impressions (impressions in latent print lifts or deposited in dirt/paint/ink/blood, etc.) before lunchtime.
A remote latent print search of the FBI's national database of over 50 million criminals often takes less than a half-hour from start (preparing a digital image of the impression) to finish (receipt of a list of the best 20 matching fingerprints from the national database). The FBI provides free Universal Latent Workstation (ULW) software for official use by any US law enforcement agency, and latent print searches can be launched from any local police agency's Internet account using the FBI's Law Enforcement Online network (LEO is free to all US police agencies). In most states, local police agencies will spend tens of thousands of dollars annually for maintenance of state-connected AFIS terminals (which gives them access to fingerprints the FBI does not have), but the FBI connectivity for searching latent prints via LEO using ULW is free*.
* Of course, the local police agency must have an in-house Latent Print Examiner competent to perform such examinations and comparisons.
Danielle Zeger (Unregistered Guest)
Posted From: cpe-65-24-157-32.columbus.res.rr.com
|Posted on Tuesday, January 09, 2007 - 04:33 pm: ||
I had my house broken into and I do not know how the police use the finger prints to find the suspect. Although they did not take any from myself or my fiance. How will they determine the fingerprints.