We use "present tense" for this kind of case.

The new evidence will prove to be crucial in solving the case.

In any case, you are wrong in your conjecture.

Do you remember that baffling murder case?

The nominative case is used to indicate the subject of a sentence.

The plaintiff presented compelling evidence to support their case.

The private detective was hired to solve the mysterious case.

Please locate the emergency exit in case of an emergency.

In either case, we need to prepare thoroughly.

The D.A. is responsible for prosecuting criminal cases in the district.