DNA can provide insights into many intimate aspects of a person and their families including susceptibility to particular diseases, legitimacy of birth, and perhaps predispositions to certain behaviors and sexual orientation. This increases the potential for genetic discrimination by government, insurers, employers, schools, banks, and others. Collected samples are stored, and many state laws do not require the destruction of a DNA record or sample after a conviction has been overturned. Who is chosen for sampling is also a concern. In the United Kingdom, for example, all suspects can be forced to provide a DNA sample.
Practicality also is a concern.
The statute of limitations has expired in many cases where the evidence would have been useful. Moving the point of testing from conviction to arrest would result in savings in investigation, prosecution, and incarceration. Investigators would be able to compare other cases against the arrested person's DNA profile, just as with fingerprints.