An embarrassing disclosure by federal lawyers revealed the weaknesses in the government’s bid to end the New York toll program. It could mark a turning point in the case.

The 11-page document —uploaded Wednesday night to the docket for the ongoing lawsuit between New York’s Metropolitan Transportation Authority and Duffy’s DOT before being taken down—was originally sent on April 11 to DOT’s senior trial attorney Erin Hendrixson, advising her and her team to change their approach or risk losing their case.

Officials from the U.S. Department of Transportation (USDOT) fired their lawyers on Thursday after what appeared to be an administrative error from the federal team regarding the legal battle over congestion pricing in NYC.