Case against witness for not showing up (after acquittal)

Never dig into the past ad forget about it as a bad dream, when such digging yields no results and avoid those that involve further agony, tension, and expenses.  The witness must come to his own will and it is the Court that has to summon if such witness is important to decide a complicated fact.  The facts that are stated on oath are public records as proceedings and mere statements without standing for cross may not be having such effect of perjury.

Was the witness summoned by the prosecution? If not, you could have summoned him/her as your witness.