I've lived in a 10 story apartment building for about 2 years now, across from me is another building that's about the same height. If somebody in the other building has their blinds open I can see right in. Most people don't keep their blinds open, I of course do. I've seen the occasional naked person walk though their living room but just recently a middle aged woman moved into a unit a floor below us and directly across, and she never closes her blinds. I've noticed that, from my living room I can see right into her bathroom, and the door seems like it's always open. I'm not spending my days staring into her apartment but I have seen her coming out of the shower a few times. She's a bit larger and has a really nice body. Just last night it finally lined up, I was just coming out of my kitchen and I had the perfect view of her sitting on the toilet. I stopped in my tracks for a beat as I saw her stand up, with her ass towards me, wipe and pull up her panties. I'm not going to make a habit of peeping but it's exciting to know that there's a chance of catching this now and again. 

We know what those guys were doing. Well, loosely.

https://www.healthline.com/health/does-urine-have-dna By a database I mean a previous sample given to police or ancestry.com or 23andme.com