Related: Did the Space Shuttle have "military uses"? (This question is discussed in comments, but not really conclusively answered.)
One of the military requirements that was added on to the design goals for the Space Shuttle (and subsequently never used) was to be able to launch, deploy or retrieve a large satellite (probably a military or CIA spy satellite), and then land within a single orbit.
Some sources have claimed that this was explicitly in order to allow the military or CIA to capture USSR or other adversaries' satellites intact and return them intact to the USA. Some other people have argued that this is not supported by evidence or terribly convincing, and have pointed to arguments that the fast retrieval requirement is just to retrieve our own/allies satellites very quickly with minimal exposure to the USSR.
Is there any actual evidence that the Space Shuttle was ever explicitly intended to do the "military satellite capture caper"?