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Yes, you can pursue the matter - you can take the information to the DA's office and work with them about pursuing a perjury claim. You can file a criminal complaint yourself.
If the DA that you talk to won't take the case - then you have the right to appeal that and take it up within the DA's office.
Do you have a copy of the transcripts which would include his statements on the witness stand?
What happens is that you file a complaint with an Assistant DA - it their ability to accept or reject the complaint. If they reject the complaint you have the ability to appeal their rejection of the criminal complaint.
Then I would take the evidence down to the DA's office and file a criminal complaint. Too, the judge should have done this if they were aware of the perjury themselves.