Friendly neighborhood thriller author and forensic scientist here! Time to answer your questions โ ๏ธ๐ซ
I got questions about this from a reader: “CSI and NCIS do DNA work that seems to get done in minutes – how long does it actually take and how expensive a test is it? Regular people expensive or Elon musk expensive?”
Let’s dive in!
Short answer: a few hours. We used to do all this by hand. Add reagents, swirl, let sit, centrifuge, wait… but now we load reagents into a machine, add our sample, push the button and come back to find it done. So that’s realllly nice.
Real answer: days and weeks and months even. But this depends on what you need done.
General paternity test? A few weeks. This means you provide the hair, spit, etc samples and you send it to a lab that operates open to the public and it’s probably not admissible in court at all.ย These are usually less than $100. And you should be able to get it back within a month. However, they aren’t as reliable. If you’ve had bloodwork done at your doctors office, those same places will do paternity and general DNA testing, but you can see the distinction between “at home” and “legal” and the price starts going up to ~$500ish for now.
This is where the back-log comes in. In order to be used in court cases, there must be a known chain of evidence. We have to be able to see if the sample was damaged, mishandled or even purposefully swapped out at any point. Also, this has to go to labs that are certified for evidentiary work and supposedly unbiased. (This isn’t always the case! Lots of police stations have their own labs that can do some testing.) But basically no one has a lab that can keep up with the need. The wait is the backlog. (Don’t even get me started on rape kits.)
So it’s not Elon Musk expensive, but it can climb up there to pay for speed! It might be cheaper to just do a basic DNA testing and get those results if paternity was needed. Paternity tests only check a known sample against another known sample–so you have to first suspect the match to test it, and if you’re wrong, you’re just wrong. Whereas a DNA testing company is checking the sample against their entire database.
If you’re in a court case and in need of evidence to go through the system fast, then yes, being billionaire rich is helpful. The irony is that you wouldn’t likely even pay for the push then, just be influential enough to make it happen. You can also go through faster if your case is high priority. So make sure to be splashy if you’re gonna need that bloodwork done legally! Get media coverage and hit the social media and make the public demand a timely response. Otherwise, you can wait 6 months or more.

















