It turns out that it is fairly easy to “create” DNA evidence to match anyone that you wish, so it is possible to plant evidence and frame a person. Standard DNA tests used in forensic labs are not able to detect such forgeries. This is another example of the need to carefully examine the science behind the forensic techniques that we use in criminal cases.
In a release announcing the discovery, the company said, “standard molecular biology techniques, such as polymerase chain reaction (PCR), molecular cloning, and more recently available whole genome amplification, enable anyone with basic equipment and limited know-how to synthesize unlimited amounts of artificial (in vitro) DNA with any desired profile.”