What is a white whale in police?

A white whale in police jargon is a term used to describe a suspect or criminal who has gotten away from law enforcement multiple times, similar to the concept of the "white whale" in literature which refers to an elusive or difficult-to-catch target.

This term may be used to signify the frustration and difficulty involved in apprehending this particular individual, as they continue to evade capture despite efforts from law enforcement.

Police departments may use information about the white whale suspect to develop new strategies or tactics to finally apprehend them and bring them to justice. Additionally, this term can also be used to highlight the importance of persistence and determination in solving cases and apprehending criminals.