The ATF, which duped mentally challenged individuals into committing crimes and then arresting them for it, says they had no idea they were mentally challenged. That's the bureaucratic equivalent of "my bad".

"We do not target the developmentally disabled," [ATF Director Todd] Jones told House Oversight and Government Reform Committee Chairman Darrell Issa, R-Calif., adding that ATF learned of that the people were disabled as "the result of defense pleadings" in court.

The Milwaukee Journal Sentinel reported that ATF targeted developmentally disabled people during undercover drug and gun-buying operations throughout the country. "In Wichita, Kan., ATF agents referred to a man with a low IQ as 'slow-headed' before deciding to secretly use him as a key cog in their sting," according to the Journal Sentinel.

[...]

Jones told Rep. Kerry Bentivolio, R-Mich., that "hindsight's 20-20," but said that ATF agents hadn't apologized to any of the mentally disabled people they recruited and then arrested in undercover operations because the individuals are in prison, so "the opportunity for interaction is limited."

Hey, why bother catching actual criminals when you can simply make up crime and arrest people for it?