On the lack of corroborating evidence front, recall the Novitsky trip to Interpol where he met with the AFLD & OCLAESP, along with others. Part of the reason for the visit was said to be to learn how to transfer evidence to the United States.
Before he left his AFLD position, Pierre Bordry worked with Jeff Novitsky. He had the six 1999 Tour de France samples that were found to contain EPO. They were properly stored. He offered to have them tested, or shipped to the US, or whatever Novitsky wanted.
I read a quote later and documented it at the time that a member of the AFLD also said they had two years of Tour de France samples stored, I believe 2000 & 2001, and they'd be happy to get them out of the fridge. It's interesting that they saved them after the eight year SOL had passed, but they offered them along with any other evidence they had against Armstrong.
The OCLAESP had the syringes and things found in the Astana dumpster during the 2009 Tour de France. It was said that there was DNA from eight different people on the doping items.
The Spanish Civil Guard were at the meeting, and it was said that, among other things, they were to check Armstrong's old apartment - the one with the refrigerator in the closet.
Then recall that Novitsky and the Feds were on this case before we knew about it, and had access to wire taps if they needed them, so imagine how many conversations could have been recorded since then.
They subpoenaed the 40 boxes of documents from LeMond's lawsuit versus Trek, and those for the SCA lawsuit. They also got records from Trek and Nike. Novitsky used to be an investigator for the Internal Revenue Service, so you know accounts and financial records have been scrutinized.
That's just a part of what I recall reading, and that's from a case where hardly any details have come out. Weeks go by without a whisper. So I'm pretty sure they'll have hard evidence for a lot of things that will surprise people.
Everything I've mentioned I've posted links and quotes for in past posts. I'm not going to look it all up for this one, but it's all here and on Google.
TexPat made the paper in New Zealand
http://www.stuff.co.nz/sport/other-sports/4571360/Armstrongs-bloody-dodgy-legacy