Private Detective (1939)

Private detective Myrna Winslow is working on the case of a divorcée who is accused of murdering her ex-husband. She and police detective Jim Rickey, working to solve the same crime, keep tripping over each other until they decide more progress would be made if they work together.

Jane Wyman as Myrna "Jinx" Winslow
Dick Foran as Jim Rickey
Gloria Dickson as Mona Lannon
Maxie Rosenbloom as Brody
John Ridgely as Donald Norton
Morgan Conway as Nat Flavin
John Eldredge as Millard Lannon
Joseph Crehan as Capt. Murphy
William B. Davidson as Inspector Evans