18 February 2021: Biden DOJ Wasn't Investigating Cuomo Until DeRosa Admission

Federal Prosecutors Opened Criminal Investigation After Cuomo Aide Admitted Withholding Nursing Home Death Data from State Legislators: Report

This report indicates that President Biden's DOJ officials only opened its criminal investigation after the New York Post broke the story of Cuomo deputy Melissa DeRosa's comments.

... the New York Law Journal's Jane Wester reports that acting U.S. Attorney Seth DuCharme's office opened a criminal probe into "Gov. Andrew Cuomo's coronavirus task force and its handling of COVID-19 in nursing homes" only after news of the DeRosa call went public.

It would seem DeRosa wasn't off base in thinking the Biden DOJ was planning to sit on their hands when she made her comments.