Was there an assassin on Grant's train?

[Pamela]

Wild Bill, I just want to counter your statement about Weichmann being yellow. Not one of the convicted conspirators said Weichmann was a conspirator, not even on the eve of their execution, or for those whose penalty was prison, none of them said Weichmann was in on the crime, until the day they died. Atzerodt gave multiple confessions and named everyone he could think of, but not Weichmann. If anyone would have known he was involved at least one of them would.