CLEVELAND, Ohio -- A Cuyahoga County prosecutor was fired this week after he admitted posing as a woman in a Facebook chat with an accused killer’s alibi witnesses in an attempt to persuade them to change their testimony.

Former Assistant County Prosecutor Aaron Brockler insisted in an interview at his Lakewood home Thursday that he had done nothing wrong and shouldn’t have been fired.

"Law enforcement, including prosecutors, have long engaged in the practice of using a ruse to obtain the truth," said Brockler, 35, a county prosecutor since 2006. "I think the public is better off for what I did."

County Prosecutor Timothy J. McGinty said he fired Brockler for good cause.

"This office does not condone and will not tolerate such unethical behavior," McGinty said. "He disgraced this office and everyone who works here."

McGinty continued: "By creating false evidence, lying to witnesses as well as another prosecutor, Aaron Brockler has damaged the prosecution’s chances in a murder case where a totally innocent man was killed at his work."

Brockler was the lead prosecutor in the aggravated murder case of Damon Dunn, 29, of Cleveland, who was scheduled to stand trial for the shooting death of Kenneth "Blue" Adams on May 18, 2012, at an East Side car wash.

When the opposing attorneys exchanged witness lists in April in preparation for trial, Dunn provided the names of two women whom he said could testify that at the time of the shooting, Dunn actually was on the other side of the city at Edgewater Park.

Brockler said he considered the alibi witnesses the keys to the case, and talked with the lead homicide detective about strategies.

"I didn’t share my technique with him, but we talked about the importance of breaking the alibis," Brockler said. "Unless I could break this guy’s alibi a murderer might be walking on the street. There was such a small window of opportunity, I had to act fast."

Brockler said he engaged in Internet chats via Facebook with the alibi witnesses. He said he posed as a fictitious former girlfriend of Dunn’s who had given birth to Dunn’s child, which Brockler said caused the women "to go crazy".

Brockler spoke with both of the women the following day, but did not divulge that he had been their Facebook chat partner.

He claims one woman told him, "This is bogus, I’m not going to lie for him."

He also claims the other woman also changed her story, according to Brockler. "She said she wasn’t at the beach with him and she wasn’t going to lie for him. They both wanted the truth to be known," Brockler said. The women couldn’t be reached for comment. Both are still listed as alibi witnesses by Dunn’s lawyers.

Brockler said he told Dunn’s defense lawyer, Myron Watson, that his client’s alibi had fallen apart.

He printed transcripts of the Facebook chats and put them in his file, with no intention of keeping them secret, he said.

Then, several days later he left the office for a two-month medical leave to have eye surgery.

While Brockler was away, he received a call from Assistant County Prosecutor Kevin Filiatraut, who had replaced Brockler on the Dunn case during his absence and questioned him about the Facebook chat transcripts that he found in the file.

"I told him that was me," said Brockler.

Filiatraut informed his supervisors. McGinty said he acted immediately.

"As soon as we learned of Aaron Brockler’s actions we removed this office from the case, informed the court and the defense, handed the case off to the Ohio Attorney General’s office, and began the disciplinary investigation that this week led to Aaron Brockler’s dismissal," McGinty said.

"We gave him a chance to make an explanation. He gave contradictory statements. We dismissed him," McGinty said.

Filiatraut challenged Brockler’s claim that prosecutors have long used such ruses to obtain the truth.

"In no way are the actions of Aaron Brockler pertaining to the two witnesses in question standard operating procedure in the major trial unit or any other unit in this office," Filiatraut said.

Common Pleas Judge Jose Villanueva ordered that all future court filings in the case be sealed.

Watson said he had asked for and received transcripts of the Facebook chats, which were turned over to a Cleveland homicide detective, who traced the transmissions to Brockler’s computer in the Justice Center.

"I know those e-mails are going to be juicy reading material," Watson said.

The next hearing in the case is scheduled for later this month.

On Monday and Tuesday, Brockler had a series of meetings with his supervisors, including a sit-down with McGinty. Brockler said he freely admitted what he had done, and McGinty fired him.

The Attorney General’s office was contacted so it could take over the case. "Once we realized that (Brockler) might become a witness in this case, under the code of professional conduct we had to hand it off," said Joe Frolik, a spokesman for the prosecutor's office.

Brockler said he was motivated by a sense of justice and sympathy for the victim’s mother, whom he said he had developed a relationship with.

"I felt her pain over losing her son," Brockler said. "I made a promise to her that he wasn’t going to walk out the front door of the courthouse. This was a horrible killer and I didn’t want him to get out and go kill someone else’s son."

Brockler said he loved his job and feels he got a bad deal.

"To me, this is all a massive overreaction," Brockler said. "I wasn’t some rogue prosecutor sitting behind a computer trying to wrongfully convict someone. I did what the Cleveland police detectives should have done before I got the file."