[zcrackerz]

In the presence of other evidence, it's definitely useful to narrow down to reasonable doubt territory. Even DNA isn't unique, in the case of twins, but is still used all the time.

[adrianN]

Not only twins show the same DNA evidence. Cheap methods for DNA fingerprinting as used in criminal investigations have nonneglibile error bars.

[shakna]

Not just cheap methods - even if the methods are better, they have a history of not being followed correctly [0][1][2].

[0] https://nypost.com/2017/02/10/thousands-of-convicts-told-tha...

[1] https://www.nytimes.com/2003/03/16/weekinreview/the-nation-y...

[2] https://www.kuer.org/post/private-utah-dna-lab-faces-scrutin...