Bert VAN DIJCK
|Posted on Tuesday, October 08, 2002 - 03:26 pm: ||
You can try (ethanolbased) fluorescine reagens.
DNA after enhancement isn't a problem.
The PSDB manual is very good indeed. For specific problems, try FingerprintWhorld and the Journal of Forensic Identification
|Posted on Monday, October 07, 2002 - 09:56 pm: ||
Here we have the main problem area for latent examiners. Our processes generally will negate the retention of blood for later analysis. You will have to choose what is the best evidence the blood, or the latents. Try to swab or cut a small area near to any ridge detail to retain for DNA if at all possible.
If you process for latents, then visual, light source followed by a blood enhancing reagent. Ninhydrin would be OK, or Amido Black. Also consider DAB.
An excellent reference tome is the Manual of Fingerprint Development Techniques, published by the British Home Office and available here in the US (Lightning or Sirchie etc). This was first published in 1988 and has since been updated twice. I believe 1993 and 1998. The authors, the Police Scientific Development Branch (PSDB) conducts national research into latent development for all police services and have done so for over 30 years. Invaluable in any laboratory.
|Posted on Monday, October 07, 2002 - 06:13 pm: ||
Is it possible to enhance fingerprints in blood on a plaster pedestal? If so, how? I also need to keep the DNA evidence preserved for testing. For future reference, where is the best place to look for information on processing specific difficult surfaces?