I disagree.
How Forensic DNA Evidence Can Lead to Wrongful Convictions | JSTOR Daily
Then there’s the uncomfortable and inconvenient truth that any of us could have DNA present at a crime scene—even if we were never there. Moreover, DNA recovered at a crime scene could have been deposited there at a time other than when the crime took place. Someone could have visited beforehand or stumbled upon the scene afterward. Alternatively, their DNA could have arrived via a process called secondary
transfer, where their DNA was transferred to someone else, who carried it to the scene.
Additionally, DNA technology is becoming more and more sensitive, but this is a double-edged sword. On one hand, usable DNA evidence is more likely to be detected than ever before. On the other hand, contamination DNA and DNA that arrived by secondary transfer is now more likely to be detected, confusing investigations. If legal and judicial personnel aren’t fully trained in how to interpret forensic and DNA evidence, it can result in false leads and miscarriages of justice.
This link came from the above article (a report from forensic scientists) has a bunch of information about transfer DNA, including scenario's and criminal cases where it was found to be transfer DNA. Do a search for "transfer" in the document:
https://senseaboutscience.org/wp-content/uploads/2017/01/making-sense-of-forensic-genetics.pdf
DNA gets everywhere. Besides the more obvious methods of DNA transfer, including drops of blood or deposits of semen, small amounts of DNA can also find their way onto people, places and objects via droplets of saliva from talking, sneezing, skin cells shed into house dust or by being left on the surfaces that people touch.
Given how easily DNA can be transferred, this means your DNA could be in a room even if you weren’t.
If your DNA is found at a location, it could be present because:
(a) You have been there;
(b) You touched an object that was later carried to the location by someone else (eg an item of your clothing);
(c) You encountered a person, who soon after touches something at the location, inadvertently leaving your DNA there (eg you shook hands with them or you both previously touched the same surface).
Scenario: A man is attacked by someone wearing a mask, while walking home from a party. Your DNA is found on the victim’s hands. You were also at the party, and had no direct contact with the victim, but you both poured a glass of wine from the same bottle. This caused your DNA to be transferred to their hands. This is known as secondary transfer.
Real life Example: When local taxi driver David Butler’s DNA was recovered from the fingernails of murdered sex worker Anne Marie Foy, it seemed like an open and shut case. It was presumed that Ms Foy had torn at his skin as he hit and strangled her, before dumping her body in a park near Liverpool city centre in September 2005. The amount of DNA found by police was tiny, but enough to generate a hit against the UK’s DNA database (see next chapter), identifying Mr Butler as the source. He denied ever having met the victim, but even though other evidence was lacking, the DNA evidence was enough to see him charged with murder. However, Mr Butler’s defence team queried precisely how that DNA got onto the victim’s nails. They established that he was sometimes known by the nickname “flaky”, because of the dry skin condition he suffered from, and suggested that perhaps some of his skin cells had transferred to bank notes that were later used to pay Ms Foy — an example of secondary DNA transfer — or they had been transferred to her through other innocent means12. Mr Butler was acquitted.
Framed for Murder By His Own DNA
Framed By Your Own Cells: How DNA Evidence Imprisons The Innocent
Tiny amounts of touch-transferred DNA have placed people at locations they had never visited and implicated people for crimes they did not commit.
These are just from the first 3 links when googling "Transfer DNA wrongful conviction". For anyone that believes it's not real, you really should read the links, or even google it yourself and see just how many links/cases/documents/reports show up. This stuff is pretty scary if you think about it LOL But as the one article stated, with advanced technology and the ability to pick up the DNA, the flip side is they are also able to find transfer DNA.
