It's worth noting that an FBI investigation found no evidence that the IRS was targeting conservative groups, and that the apology was issued by the Trump Administration, who might have a vested interest in making the IRS look bad.
"In January 2014, James Comey, who at the time was the FBI director, told Fox News that its investigation had found no evidence so far warranting the filing of federal criminal charges in connection with the controversy, as it had not found any evidence of "enemy hunting", and that the investigation continued. On October 23, 2015, the Justice Department declared that no criminal charges would be filed. On September 8, 2017, the Trump Justice Department declined to reopen the criminal investigation into Lois Lerner, a central figure in the controversy.[1]
In late September 2017, an exhaustive report by the Treasury Department's inspector general found that from 2004 to 2013, the IRS used both conservative and liberal keywords to choose targets for further scrutiny."
"In January 2014, James Comey, who at the time was the FBI director, told Fox News that its investigation had found no evidence so far warranting the filing of federal criminal charges in connection with the controversy, as it had not found any evidence of "enemy hunting", and that the investigation continued. On October 23, 2015, the Justice Department declared that no criminal charges would be filed. On September 8, 2017, the Trump Justice Department declined to reopen the criminal investigation into Lois Lerner, a central figure in the controversy.[1]
In late September 2017, an exhaustive report by the Treasury Department's inspector general found that from 2004 to 2013, the IRS used both conservative and liberal keywords to choose targets for further scrutiny."
https://en.wikipedia.org/wiki/IRS_targeting_controversy