How to Store Dna Samples?

i'm not convinced that that sample of sperm would have been viable or necessarily stored in the correct way for it to come back with er definitive result. And how would they have possibly known that that? I don't think if it's just at the back of a fridge somewhere, it would still be a viable sample. Like we saw this with bible john as welli i just, i'm not convinced  that those swabs from katy eastburn’s body were viable... but people do that. So that's a fair question. But the that it was put in the research that i did, it was that they first had to check if there was enough of a