Page 274 of the Deborah Davis book Katherine the Great published in 1979:
“Woodward and
Bradlee learned of Bernstein’s relationship with [Buster] Riggins [a
notorious DC pimp connected to the mob] in 1978, when a District of
Columbia police detective told Post reporter Timothy Robinson that
Bernstein was was getting free material from Riggin’s pornographic
bookstore in exchange for tips on police vice investigations (The detective told the author he also received complaints about Bernstein writing bad checks to prostitutes in the early 1970s, during his Watergate reporting, but did not press charges because he thought Bradlee and Mrs. Graham would accuse him of being politically motivated.).”
That detective was Carl Shoffler, the arresting officer at the June 17, 1972 Watergate burglary.
Wow..thank you for that info.