IRS officials continued their targeting of conservative groups until as recently as the first week of May, according to a nonprofit law firm, when a top agency official apologized for the targeting and claimed that the practice had been stopped a year earlier.

“We received a letter [from the IRS] just May 6th of this year with more intrusive questions for one of our clients — [one] that is not a Tea Party group, but they’ve been caught up in this net of conservative organizations — and they were asking them about the curriculum that they used and the students that they met with,” Jay Sekulow, executive director of the American Center for Law and Justice, said on MSNBC’s "Morning Joe" on Wednesday.

Lois Lerner, head of the IRS section responsible for tax-exempt organizations, apologized for targeting conservatives on May 10. Lerner, who claimed that only low-level employees at the Cincinnati office targeted conservatives even though she signed some of the letters herself, has been placed on administrative leave.

Sekulow said that White House press secretary Jay Carney was perpetuating a “myth” that the practice of targeting was ended last year. “You almost feel horrible for [Carney] because I’m sure he’s getting his information from somebody,” Sekulow allowed.

The attorney, whose organization is suing the IRS on behalf of 27 conservative groups, also said that the IRS targeting was a broad effort involving numerous offices. “We have four [IRS] offices we’ve been dealing with over the last year and a half,” he said.