However, when 20,000 people march behind Przemyk's coffin in Warsaw, the authorities decide to use all available means to intimidate the witness and Grzegorz's mother, trying to prevent Jurek from testifying in court.

[9] Wendy Ide of The Observer called Leave No Traces "[a] meticulously detailed thriller",[10] while Cath Clarke of The Guardian said that "In the end, this film is never uninteresting but fails to gather enough pace or power for the slog of the marathon".

[1] Paul Whitington of the Irish Independent had criticized film's length but praised it for being a "conspiracy drama", adding that "[it's] a lesson from history that remains depressingly relevant".

[12] According to Guy Lodge of Variety, the film is "[a] moving but somewhat congested",[13] while Keith Uhlich of The Hollywood Reporter described Leave No Traces as "Too torturous by half".

[14] While attending film's Venice screening, Deadline Hollywood's Valerie Complex wrote that "Leave No Traces often feels formless and unremarkable".