FBI supervisor resigns after trying to investigate agent who shot Renee Good

News of Tracee Mergen's decision came before agents fatally shot Alex Pretti, another US citizen in Minneapolis

A supervisor in the FBI's Minneapolis field office who unsuccessfully attempted to investigate the Immigration and Customs Enforcement (ICE) agent who fatally shot Renee Nicole Good in the city on 7 January has resigned, according to multiple reports.

News of agent Tracee Mergen's resignation surfaced shortly before federal agents fatally shot Alex Pretti in Minneapolis on Saturday. Pretti and Good were both 37-year-old US citizens.