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He is put with a team of officers in similar circumstances and together they are given an unsolved case to work on.

And of all those unsolved cases, there is one that I have never ceased to think about.

It has to be an unsolved case where the leads have been exhausted.

Claire's mother Lin died at the age of 56 in 2008 with the case still unsolved.

He didn't like letting go of things, especially unsolved cases.

You're in Knoxville, why not see what unsolved cases they might have, and there we are.

Actually, it's the section of the system that stores information on unsolved cases.

As everybody knows, members of the Extension are to investigate unsolved cold cases.

She joined the force after her mother was murdered in an unsolved case.

After that interview, the investigation went nowhere and was left as an unsolved case.