Rep. Paul Ryan (R-WI) raked IRS Commissioner John Koskinen across the coals Friday over the seemingly ever-deepening "lost" Lois Lerner emails scandal, telling the commissioner that the agency has exhibited a "pattern of abuse" and that its insistence on "misleading" the committee has made it impossible to believe their excuses.

During the combative exchange, Ryan told Koskinen that the IRS needs to apologize to the American taxpayer for "abusing its power," and dismissed the recent excuses about Lerner's supposedly lost emails as simply "unbelievable":

Ryan: This is unbelievable. The apology that ought to be given is to the American taxpayer. Not to a government agency that is abusing its power. I am sitting here listening to this testimony, I just – I don’t believe it. That’s your problem. Nobody believes you.

Ryan then laid out the offenses of the IRS:

Ryan: The Internal Revenue Service comes to Congress a couple years ago and mislead us and says no targeting is occurring. Then it said it was a few rogue agents in Cincinati. Then it said it was also on progressives. All of those things have been proven untrue.

This committee sent a... criminal referral of possible criminal wrongdoing just a month ago to the Justice Department. We've heard nothing.

You bury in a 27-page letter to the Senate asking for them to conclude the investigation that you've lost Lois Lerner's emails during the time in question cause of a hard drive crash. Monday, our investigators asked your agency whether any other hard drives crashed, and we learned that six other hard drives -- of the people we're investigating were involved. You didn't tell us that.

At this point, Koskinen, who had been sitting quietly during the remarks thus far, chimed in:

Koskinen: We told you on Monday.

Ryan: You told us on Monday -- because we asked you!

Koskinen: Right. And what did you do with that information?

Ryan: You told us Monday that the hard drives crashed because we asked you. This is unbelievable. You told us in May that you were going to give us all of Lois Lerner's emails -- and you learned in February that this crashed.

Koskinen denied knowing in February that there was a crash and reiterated that they told the committee Monday, to which Ryan responded by highlighting the hypocrisy of the IRS's expectations of taxpayers versus its own conduct:

Ryan: You are the Internal Revenue Service. You can reach into the lives of hardworking taxpayers, and with a phone call or an email or a letter you can turn their lives upside down. You ask taxpayers to hang onto seven years of their personal tax information in case they are audited. And you can't keep six months worth of employee emails?

Ryan argued that the department's deliberate obfuscation is not "forthcoming" and clearly "misleading," which he said is a pattern:

Ryan: This is being misleading again. This is a pattern of abuse, a pattern of behavior, that is not giving us any confidence that this agency is being impartial. I don't believe you. This is incredible.

Koskinen: I have a long career, that's the first time any has said they do not believe me.

Ryan: I don't believe you.

The exchange broke down shortly thereafter, when some on the committee attempted to silence Ryan.

Video via NRCC.