An internal review said the department lawyers showed "poor judgment" but did not commit professional misconduct in giving CIA interrogators the go-ahead at the height of the U.S. war on terrorism to use harsh interrogation tactics.
President Barack Obama campaigned on abolishing waterboarding, a simulated drowning technique, and other tactics that he called torture. He left open the question of whether anyone would be punished for authorizing such methods.
Liberal Democrats had pressed for action against the authors of the so-called torture memos, and they indicated they aren't finished discussing the matter.
Judiciary Committee Chairman Sen. Patrick Leahy, D-Vt., said he was "deeply offended" by the legal memos and planned to hold a hearing Feb. 26.
"I have serious concerns about the role each of these government lawyers played in the development of these policies," Leahy said in a statement posted on his Web site.
An initial review by the Justice Department's internal affairs unit found that former government lawyers Jay Bybee and John Yoo had committed professional misconduct, a conclusion that could have cost them their law licenses. But, underscoring just how controversial and legally thorny the memos have become, the Justice Department's top career lawyer reviewed the matter and disagreed.
"This decision should not be viewed as an endorsement of the legal work that underlies those memoranda," Assistant Deputy Attorney General David Margolis wrote in a memo released Friday.
Margolis, the top nonpolitical Justice Department lawyer and a veteran of several administrations, called the legal memos "flawed" and said that, at every opportunity, they gave interrogators as much leeway as possible under U.S. torture laws. But he said Yoo and Bybee were not reckless and did not knowingly give incorrect advice, the standard for misconduct.
The Office of Professional Responsibility, led by another veteran career prosecutor, Mary Patrice Brown, disagreed.
"Situations of great stress, danger and fear do not relieve department attorneys of their duty to provide thorough, objective and candid legal advice, even if that advice is not what the client wants to hear," her team wrote in a report that criticized the memos for a "lack of thoroughness, objectivity and candor."
The internal report also faulted then-Attorney General John Ashcroft and then-Criminal Division chief Michael Chertoff for not scrutinizing the memos and recognizing their flaws, but the report did not cite them for misconduct.
Yoo is now a law professor at the University of California, Berkeley, and Bybee is a federal judge on the 9th U.S. Circuit Court of Appeals based in San Francisco. The decision spares them any immediate sanctions, though state bar associations could independently take up the matter.
The memos authorized CIA interrogators to use waterboarding, keep detainees naked, hold them in painful standing positions and keep them in the cold for long periods of time. Other techniques included depriving them of solid food and slapping them. Sleep deprivation, prolonged shackling and threats to a detainee's family were also used.