WASHINGTON — Gina Haspel’s long spy career is so shrouded in mystery that senators want documents declassified so they can decide if her role at a CIA black site should prevent her from directing the agency.

It’s a deep dive into Haspel’s past that reflects key questions about her future: Would she support President Trump if he tried to reinstate waterboarding and, in his words, “a lot worse”? Is Haspel the right person to lead the CIA at a time of escalating Russian aggression and ongoing extremist threats?

Gina Haspel

Haspel’s upcoming confirmation hearing will be laser-focused on the time she spent supervising a secret prison in Thailand. The CIA won’t say when in 2002 Haspel was there, but at various times that year interrogators at the site sought to make terror suspects talk by slamming them against walls, keeping them from sleeping, holding them in coffin-sized boxes and forcing water down their throats.

Haspel also is accused of drafting a memo calling for the destruction of 92 videotapes of interrogation sessions. Their destruction in 2005 prompted a lengthy Justice Department investigation that ended without charges.

“We should not be asked to confirm a nominee whose background cannot be publicly discussed and who cannot then be held accountable for her actions,” said Sen. Martin Heinrich, who joined other Democrats on the Senate intelligence committee in asking the CIA to declassify more details about Haspel. “The American public deserves to know who its leaders are.”

Court filings, declassified documents and books written by those involved in the CIA’s now-defunct interrogation program suggest Haspel didn’t arrive at the secret prison in Thailand until after one detainee, Abu Zubaydah, was waterboarded 83 times in August 2002. But they indicate she arrived before another detainee, Abd al Rahim al-Nashiri, was waterboarded at least three times in November 2002.

Details about the two detainees’ treatment were disclosed in a 2014 Senate report. It said the prison was shut down in December 2002.

Even if Haspel was at the prison site for just a few months, Steven Watt, an American Civil Liberties Union attorney, said she was deeply involved in the interrogation program. For much of its existence, Haspel was deputy director of the CIA’s counterterrorism center that ran the program using “enhanced interrogation techniques.”

At least 119 men were detained and interrogated as part of the program, said Watt, who represented two detainees and the family of another in a 2015 lawsuit against a pair of CIA-hired psychologists.

It’s unknown if Haspel ever was or currently is an enthusiastic proponent of brutal methods, or if she was only implementing orders from CIA headquarters.

Several colleagues and former intelligence officials have come to her defense.

Mike Morell, who was an acting director of the CIA, worked closely with Haspel from 2006 until he retired in 2013. Morell has described her as a “warm and engaging” colleague with a “self-deprecating” sense of humor. She’s a “simply exceptional” person who gets things done in a “quiet, yet effective way” and is “calm under fire,” he wrote in The Cipher Brief, an online newsletter on intelligence issues.

“The media is also likely to refer to a moment in her career when she drafted a cable instructing a field station to destroy videotapes of CIA interrogations of senior al-Qaida operatives,” Morell wrote when Haspel became deputy CIA director last year. “She did so at the request of her direct supervisor and believing that it was lawful to do so. I personally led an accountability exercise that cleared Haspel of any wrongdoing in the case.”

While some of assignments have come under political fire, “in each case she was following the lawful orders of the president,” Morell said. “And, in each case, she carried out her responsibilities within the bounds of the law and with excellent judgment. Any criticism of her in this regard is unfair.”

Psychologist James Mitchell, an architect of the CIA program who worked at the same black site, said Haspel won’t filter the intelligence she distributes to Trump through a political lens to please him or jockey for political reward.

“We’d be shooting ourselves in the foot if she’s not confirmed,” he told Fox News. “She’s got deep institutional knowledge. She has worked more than 30 years in the agency. She’s earned the right to be there. She can go to work on Day One.”

Former CIA spokesman Bill Harlow, who helped Mitchell write a book, said the focus on interrogation obscures the CIA director’s wide-ranging portfolio. Instead of re-litigating the past, he said Haspel should be asked about Russia, China and cyber threats and how to improve intelligence collection on America’s adversaries.

Ret. Air Force Col. Steven Kleinman, a longtime interrogator with lengthy experience during the first Gulf War, isn’t sure. He said he doesn’t know Haspel’s personal views about the harsh interrogations, but said there’s no indication she ever tried to halt them.