I Killed That Man is a 1941 American mystery film directed by Phil Rosen and starring Ricardo Cortez, Joan Woodbury and Iris Adrian.

Having never given a confession, Ross proceeds to tell the crowd of the true events of what happened as his benefactor promised him his release; but then falls over dead, the victim of a poison dart.

District Attorney Roger Phillips conducts a search of the occupants of the room and together with his girlfriend crime reporter Geri Reynolds and his young receptionist Tommy solve the murder and the criminal mastermind behind Ross.

Roger becomes suspicious of an elderly man named Lanning, Ross's character witness, because he has a cigarette holder which could be used as a dart blower.

After Roger is reprimanded for arresting Lanning, whom he admits is an unlikely suspect, he asks Geri to interview Ross's girl friend, Verne Drake.

Roger is then mystified by a code written on the back of King's business card, and asks Tommy, a switchboard operator who wants to be a detective, to decipher it.

Verne, meanwhile, plans to leave town and demands that J. Reed, the head of an organization which opposes capital punishment, return the money she gave him to obtain Ross's release.

Collins catches Reed when he runs, and Roger later discovers a poisoned dart embedded in the steering wheel that matches the one that killed Ross.

[6] The Chicago Daily Tribune said the acting was "all right" and the direction "pretty good" but that the story "gets away from a decidedly 'different' start into accustomed ruts.