A former Civilian Complaint Review Board official who oversaw the hiring of people to investigate cops was caught lying during a murder trial when a secret phone-sex tape exposed her relationship with the accused killer.

Carolene George, the CCRB’s ex-human resources chief, tried to give an alibi for Clement Reynolds, telling jurors at his Maryland trial last week that he was working as a handyman in her Queens home the night of the 2002 drug-related slaying in Montgomery County, Md.

George also told the court that she dated Reynolds — but that their fling ended by 2012.

But prosecutors played a tape of her talking dirty to him on a jail-house phone more recently than 2012.

“I’m thinking about you, I’m thinking about the last time I had your — you know — up in me,” she said to Reynolds, who was convicted Tuesday.

George was embarrassed and frustrated as the prosecution grilled her.

“Do you remember saying, ‘The last two times you called, I was washing my ass; that’s why I thought you might be interested in my behind?’ ” prosecutor Bryan Roslund asked.

“That’s right,” George snapped defensively, according to a recording of the proceeding. “Maybe I did.”

George also falsely told the court that she was still employed at the CCRB, which she left in 2013.