The Church Committee investigated excesses at CIA. The article deals mainly with creating agitprop which the administration creates regularly on its own.
The reforms put in place since then has prevented any rouge sort of activity which might not have been in the interests of the US to peruse, be legal, or otherwise explicitly asked for by the president or congress for them do
Whew! What a relief! Now all the nasty rogue intel agency things are only done at the behest of elected officials!
(And if you believe that I have a number of bridges to sell you. And if you believe that's a good state of affairs, well, elected officials come and go, and someday there will be one you really don't like, if there hasn't been one already.)