The Family Secret (1951 film)

[1] Law student David Clark kills best friend Art Bradley in self-defense after an argument.

The next morning, Howard expects his son to explain what happened to district attorney Redman, but instead David merely asks the DA if he can be of any help after another man, Joe Elsner, is arrested.

Marie Elsner comes to Howard Clark, asking that he represent her husband in court.

He has always been irresponsible, which is why secretary Lee Pearson keeps resisting David's romantic attentions, even though she is attracted to him.

David finally realizes he must turn himself in and promises to Lee he will lead a better life.