A Texas Ranger got a prolific serial killer to talk

Pretty sure he made all of them up.

I can't find any confirmation he didn't.

He certainly made most up. It would be seriously easy to match someone you actually murdered to the real incident if you wanted.

Even 20 would still impossible without solid matches by now.

Given the number, he will eventually match in an unknown case reasonably well, so I'd like to know more about the one 'match'

Life isn't a movie. The fact they think he has a photo graphic memory only goes to show they are easy to fool.

Yes. Prolific, but I wasn't talking about the number of victims but the number of produced serial killers. I know that there were (and are!) many serial killers in other countries, but what I am asking is how and why did USA produce more serial killers as a cultural and sociological phenomenon. You could say "Ok, but you don't know that and your observation can be explained, because in US they caught more of these guys while in other countries they remain unidentified". That is really hard to believe because many LE and their corresponding Investigation Divisions in the world have the same level and resources that in USA and it is really hard to loose tracks of many linked murder cases, even when they seem unrelated at first. Given enough time, data, and evidence, someone will relate those cases if they were committed by a mostly psychological-driven serial killer. I also know that they look for the easy prey (as you said, it's logical), but there's something that seems out of that dimension in this issue. I also find really hard to miss that mass-shootings in USA are something far from logical (I'm not talking about accessibility to guns, or laws and policies about guns). I apologize if I offended someone.