People may share DNA with the handshakes. This will be enough for 10 seconds, figured out the experts of the University of Indianapolis, together with colleagues from the Houston center of scientific forensics.
The experiment consisted in the following: people shook each other's hands, followed by one of the volunteers took the knife. The results of these experiments it turned out that in 7% of cases most of the DNA on the knife handle belonged to a volunteer, who himself never even touched it. There is no other explanation: DNA "migrated" to the thing through the intermediary of the second volunteer.
However, scientists note that it is likely the process of transferring DNA is faster than 10 seconds.
This finding scientists can turn the existing scientific views on the exchange of genetic data and is able to significantly influence the work of the structures engaged in the investigation of criminal cases. Because it means that the reliability of the search of criminal elements on DNA is now being questioned.