Agency officials identified the investigators on Wednesday as Milwaukee Special Agent-In-Charge Willie Brantley and former Milwaukee Special Agent Anna King.
Attorney General J.B. Van Hollen has said they were responsible for delays in cases that allowed one suspected child pornography distributor time to allegedly molest an 11-year-old boy and weakened a case against another.
The agents left the agency on March 19. DOJ officials aren't saying whether they were fired or resigned.
A message left at a possible residential listing for Brantley wasn't immediately returned. Four possible numbers for King in the Milwaukee area were all disconnected.