The FBI had previously investigated the Club Q shooter. In the summer of 2021, after family members reported that he was building a bomb in a basement and had threatened to kill them, FBI agents opened an investigation of Aldrich. They closed that inquiry less than a month later.
As the federal agents gave the future mass shooter a pass, the FBI, with the help of a pink-haired undercover cop, aggressively targeted local political activists seeking affordable housing and police accountability.
Source: The FBI Used an Undercover Cop With Pink Hair to Spy on Activists and Manufacture Crimes.