Last year, Pacheco confirmed he was the person seen on surveillance footage entering and leaving the building.
EMS rushed him to Brookdale University Hospital, where he was pronounced dead a short time later.
The FDNY says a fire broke out on the fifth floor of an apartment building at 451 Kingston Ave. on Monday afternoon. Fire officials say two people were taken to nearby hospitals for minor injuries.
Internal documents revealing workers rated as "exceptional" raise concerns over the administration’s workforce restructuring.