Case Study 5 - SARCS-LED

The SARCS-LED (Sexual Assault Rapid Crime Scene-LED) was used to conduct an examination of a SARC’s (Sexual Assault Referral Clinic) medical suite. The results in the attached pictures showcase the power and clarity of the SARCS-LED light source. The SARCS-LED operates at wavelength 445nm (5nm either side of peak) supported by 4w of power.

Tech-Long Industry developed the SARCS-LED in collaboration with UK Law Enforcement.

Case Study 4 - TBL-Mini Laser

The images taken for this case study were taken by Professor Cassella, in the Trauma facility at Staffordshire University. Human teeth have been reported to fluorescence under various lighting conditions.

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Here human teeth are fluorescing using the TBL-Mini laser at 445nm wavelength, when compared to ambient lighting in the second image, which is not fluorescing.

Case Study 3 - DBL6

DBL6 – 445nm Wavelength

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White cotton pants demonstrating the presence of particulate gunshot discharge residue (firearms discharge residue) on the fabric.

Case Study 2 - DB-LED

The attached pics are using the DB-LED – 530nm wavelength. Both images were taken at the Crime Scene House at Staffordshire University.

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The CS2 1 image demonstrates the presence of human semen on a white cotton shirt, the higher contrast dark stain is human blood. The CS2 2 image demonstrates the presence of human semen on a pair of white cotton pants.

Case Study 1 - TBL-Mini Laser

An examination of fluorescence emitted from temporary tattoos placed on pig skin. The aim of this research was to determine if an unknown body at post mortem could be identified from the tattoos even after 3 weeks of decomposition. 

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The various wavelengths of Tech-Long laser light were able to assist in enhancing the temporary tattoos. Some of the chemicals released into the water as part of the decomposition process of the pig skin made the water fluoresce as can be seen in the bottled samples; this offers interesting opportunities to look for bodies in lakes and rivers etc. if they indeed fluoresce.

Decomposition of Pork Flesh with Tattoo Study

Professor John P. Cassella 
Department of Criminal Justice and Forensics 
School of Law, Policing and Forensics

Science Centre, Staffordshire University