I assume this is hinting about the case of "Joseph James DeAngelo" (https://en.wikipedia.org/wiki/Joseph_James_DeAngelo), also known as the Golden State Killer. This year, I read Michelle McNamara's book "I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer". Highly recommended!
As I understand, it is relatively easy to cross-contaminate samples. How is this risk reduced? Or do all people who handled the biological evidence also get DNA tested to exclude themselves?
And do all US states and federal level courts treat DNA equally. More interesting to me: Might we see a case where a criminal can be tied to the crime by biological evidence, but there is a court system "gotcha" that allows them to remain free?
As I understand, it is relatively easy to cross-contaminate samples. How is this risk reduced? Or do all people who handled the biological evidence also get DNA tested to exclude themselves?
And do all US states and federal level courts treat DNA equally. More interesting to me: Might we see a case where a criminal can be tied to the crime by biological evidence, but there is a court system "gotcha" that allows them to remain free?