What is Sperm Tracker ?

Rape is a global scourge. It is estimated that 1 woman out of 5 will face rape or attempted rape in her lifetime. Hidden truth lies in millions of unsolved rapes that cannot be proven in the absence of evidence found, sperm traces in front. According to RAINN, out of 1000 sexual assaults, only 4.6 rapists will go to jail.

Crime Scene and Crime Laboratory Technicians often face the difficult task to locate semen traces on evidences and on the scene within a short period of time.

If alternate light sources are widely used, scientific literature agrees that they are unspecific (false positives) and insensitive (false negatives).

It is sometimes estimated that 30% of semen stains are missed by alternate light sources available on the market. Acid Phosphatase spot tests, if more sensitive and specific, are using carcinogen reagent for the user, are long to perform, require lab-prepared mixtures and often lead to repositioning issue and wrong sampling.

After years of research in collaboration with the French Scientific Police (SNPS), AXO Science is now bringing to the forensic experts the Sperm Tracker Technology that improves both sensitivity and specificity of semen detection and offers many advantages to crime laboratory experts and CSI for detecting semen stains.

Learn more about STK technology

Two products for Total Scene Screening

Screen the rape scene

STK Spray disrupts current procedures by instantly & reliably detecting semen traces directly on the scene.

We empower Police forces by bringing this new tool to the very hands of Crime Technicians, on site and allow a complete screening of a rape case.

Stop wasting time with tons of false positives and never leave a crucial evidence behind again.

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Screen clothes in the lab

Mapping technics often use toxic reagents that are then time consuming and dangerous to use both for DNA and the operator.

Alternate Light Sources are known for generating lots of false positives and also...false negatives.

STK Lab is ready to use, non-toxic, highly sensitive and specific to semen.

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One solution to screen victim's body and hair

Screen victim's body and hair

AXO Science has developed STK Skin, a sprayable solution that allows to specifically detect semen on victim’s skin and hair.

Non-toxic, reliable and specific, STK Skin is the essential solution for forensic experts.

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They trust us

Both the STK Lab and Spray worked very well. I tested the products on undilute semen stains on a laminate tile and two dark polyester fabrics. The fluorescence was quickly and clearly visible.

Sam - Houston State University (USA)

Our project was focused on the possibility of obtaining results from STK Skin device even in extreme conditions, such as high humidity levels: the results were surprising and we're eager to share these findings with first aid centers in the Piedmont area as soon as they become available

S. Cisana & M. Omedei, Regional anti-doping center; E. Alladio, University of Torino (Italy)

Results are very promising, sperm dog to locate the area and STK Spray to find the sperm traces in the last square meter, it looks like a very efficient team work.

Aki Salonen - Central Police Dept, Crime Scene Investigation Unit, Tampere (Finland)

As a Forensic Nursing Program, STK Skin has been a huge benefit to our practice. It has given us an additional tool to visualize potential evidence not previously seen during the sexual assault kit collection.

Kailyn Laswell, Forensic Nursing Coordinator - Crisis Services of North Alabama (USA)