[asquabventured]

That could explain the group chats sure but there are also a couple references to a message and the content from person A to person B.

So did the government come into possession of those messages by getting a warrant for the phones and discovering the messages post fact or is there some indication that the government was legally (or illegally) intercepting the messages over the wire?

[jffry]

Either the Feds have compromised Signal's encryption scheme, OR they compromised one of the two people's phones, OR they just got one of the two people to flip and give them access to the message history.

I certainly know which one I think is likely.