Misfire, with Lloyd Nolan as the Michael Shayne character. In this entry, Nolan is serving on a jury in a murder trial. A witness is knifed while testifying, so Nolan immediately jumps out of the jury box and hides the knife under a table. I'm no legal expert, but I think this qualifies as either suppressing evidence or obstruction of justice.
It gets worse. Nolan figures out who killed the witness ... some professional knife-thrower guy named "Shiverino," or something similar. Nolan tracks down the guy to a warehouse, and breaks in (I think that is also illegal). Then the guy turns up dead. In trying to escape, Nolan slugs a security guard (sounds like assault and battery to me). In the courtroom finale, Nolan, still acting as a juror, is allowed to call and question witnesses. Then he sums up the case, Charlie Chan-style, but you need a scorecard to figure out who did what to whom and where. Justice is served, somewhat, as Nolan gets a short jail term for contempt of court. The screenwriters should have gotten the electric chair.
This film is not even amusing. Nolan comes off as irritating, which is too bad, since I like him. Marjorie Weaver, who plays a reporter, aids and abets Nolan. Phil Silvers is barely funny as a newspaper photographer. Janis Carter, a lovely B-movie gal, is completely wasted as the defendant. She has little screen time, and only has a few lines near the end of the film. The fight and chase scenes are shown at high speed, in an early attempt at Cinema de Benny Hill.
Joan Valerie sings (or lip-syncs) "It Happened, It's Over, Let's Forget It." Sound advice.