Bicycling: So how did you satisfy yourself that what you were getting was 100 percent of the truth, and not 80?
Coyle: As I describe in the book, I set out the parameters. I would get full access to his materials and sources, nothing would be off limits. So, an example is the root beer can with the secret compartment in it [which Hamilton used to hide EPO]. There were testing moments where you pursue a line of inquiry and keep pursuing and see where it goes, and after a few weeks of this he sent me photos of secret root beer can.
After several months, we took a trip to Europe together and went to buildings where the events happened. When we walked through the Hotel l’Esplan [scene of a Tour de France transfusion], Tyler and I had to explain our reasons for looking at the rooms. So we told the owner we were having a family reunion and wanted to check the rooms to see if they were big enough. He gives us the key and off we go. Tyler led the way, right turn, left, and it was obvious he knew where he was going. And then when he opened the door, the room—the archway, how he can see across the foyer into the room where Lance was getting a transfusion—it was exactly as he described it. Everything was the same. When you’ve had 10 of those moments, you think, “OK, there’s something here,” and at 100 of those, you’re more sure. And then you triangulate with other sources; you ask “Is this true?” and when it all lines up with what you were told, then you get pretty secure that this is all real.
http://bicycling.com/blogs/boulderr...e-tyler-hamilton-and-lance-armstrongs-legacy/