Defense attorneyDwight BradleyMasen is successful in seeking the acquittal of a young man, Rudi Walchek, accused of knifing to death the 19-year-old son of a local locksmith, but when Rudi lets a comment slip after the trial, Masen realizes he has defended a guilty man. Masen discovers that Rudi is also a member of a syndicate extorting money from the scared merchants in the locksmith's neighborhood. After unearthing new evidence, Masen tries to convince the D.A. to retry the case, but the latter refuses on grounds of double jeopardy. Masen discovers that the head of the citizens' crime commission is also involved in the syndicate. In a rage Masen kills Layford, but the murder is pinned on Rudi. Despite sensing a higher justice at work, Masen feels obliged to defend Rudi once again. This time Rudi is found guilty. Masen confesses to the D.A. that he is the culprit, but the D.A. feels justice has been served and refuses to reopen the case. Masen makes one final visit to Rudi in prison, confesses, gives him the murder weapon and turns his back to Rudi to await his fate.
According to MGM records the film earned $381,000 in the US and Canada and $330,000 elsewhere, resulting in a loss of $455,000.
Critical response
Film critic Dennis Schwartz questioned the screenplay and the casting in his review of the film, "A contrived morality lesson is delivered by sentimental lawyer Walter Pidgeon, from a plot that is held together by social conscious issues alone. Richard Thorpe directs this capable but miscast cast in this bizarre and incredulous triumph of justice tale... By the end, everyone looked foolish with Pidgeon looking dead foolish. Pidgeon has the kind of ridiculous lawyer part where even someone as esteemed as Clarence Darrow couldn't have played it convincingly; so I don't blame Pidgeon for this misfire." Critic Craig Butler also discussed the screenplay in his review, "The Unknown Man has an interesting message, but the manner in which it is presented makes for some significant believability problems. For instance, it's hard to believe that a lawyer with no criminal trial experience would be able to get his client off in the way he does in Man... Man might have been a better film if the writers had kept things a little simpler, but it's worth a look for crime fans on the lookout for something they haven't seen a dozen times."
