Counterfeiting DNA samples is a nightmare nightmare

Israeli biochemists have published a scientific work with a detailed description of how to change blood and saliva samples, so the DNA test will show on another person. Moreover, scientists consider it possible to fake a specific person's DNA sample even without having a sample of biological material from his body, but simply on the basis of information of the genetic profile of this person from the database.

If there is an opportunity to get a sample of the victim's material (hair or a drop of saliva on the goblet), then the sample is counterfeit using the amplification of the genome by the method of polymerase chain reaction . This is a standard technique that is widely used in biological and medical practice, for example, for diagnosing diseases, for establishing paternity, etc. In this case, the amplificator is launched to its fullest to synthesize a large number of pseudochromosomes, which can then be embedded in biological material at the crime scene (the same drop of blood, saliva, fingerprint fragment).

The DNA substitution technique is available to any senior biofac student, said Dan Framkin, lead author of the study, in an interview with the NY Times. He says that the existing equipment of forensic laboratories is not able to detect the difference between real and fake DNA. Therefore, Framkin and his colleagues founded the commercial firm Nucleix , which sells equipment to detect amplification in DNA samples. This is possible on some specific grounds (there are not enough specific molecules in the chains).