Try the following search:
"ellsberg plumbers"
Which brings up (third result) The Columbia Guide to America in the 1960s, edited by David R Farber, Beth L Bailey:
The first major episode in what came to be called the Watergate scandals occurred in July 1971. At Nixon's orders, White House aides had formed a secret group called the Plumbers, to plug all leaks of secret information from the executive branch.
The Plumbers' first target was Daniel Ellsberg. A former Pentagon consultant, Ellsberg had inspired Nixon's wrath by leaking a secret government report on the Vietnam war, dubbed the "Pentagon Papers," to the New York Times. These documents revealed that the U.S. government had continuously misled Congress and the American people about the course of the war... in hopes of destroying Ellsberg's credibility, the Plumbers broke into his psychiatrist's office, looking for embarassing personal records.
Next, I recommend the key words "perjury obstruction conspiracy watergate".
Finally, search using "ecclesiastes new sun" to find that there is nothing new under the sun :-)
