SAN FRANCISCO (CBS / AP) — The sponsors of California’s same-sex marriage ban want the now-retired federal judge who declared Proposition 8 unconstitutional to surrender videotapes of the trial that led to his ruling.

Lawyers for supporters of the voter-approved ban also asked the 9th U.S. Circuit Court of Appeals on Wednesday to prohibit former Chief U.S. District Judge Vaughn Walker from playing the recordings for anyone else.

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The motion came in response to a talk Walker gave in February at the University of Arizona and rebroadcast on C-Span.

During his presentation, the judge showed a clip from the trial.

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The lawyers say that violated a U.S. Supreme Court order and assurances from Walker.

A spokeswoman for Walker, Janis MacKenzie, said the judge was out of town and not available to comment.

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