Is a matter brought to trial when the jury is sworn or when the first witness is sworn in a non-jury trial?

When a witness at the preliminary hearing is unable to testify at trial, can the former witness be used at trial? (California, United States of America)

What are the principles of a motion for a new trial where a witness in a murder trial later dies before the trial has even begun? (California, United States of America)

Can a defendant who does not have a written waiver allowing him to attend the criminal trial of a witness be present at the trial of the witness? (California, United States of America)

Is a defendant's claim that the trial court's failure to provide him with the means and subpoena witnesses to defend at trial a violation of his Sixth Amendment right to represent himself at trial reversible? (California, United States of America)

When a defendant makes a mid-trial motion to revoke his self represented status and have standby counsel appointed for the remainder of the trial, does the trial court have a duty to manage the trial? (California, United States of America)

Does a deputy district attorney acquiesce in having the motion heard during the trial of a defendant before trial, rather than prior to trial? (California, United States of America)

Can a witness be admitted as a witness at a preliminary hearing where the witness is in a state hospital? (California, United States of America)

When a trial court makes disparaging or disparaging remarks to the defense counsel or witnesses, is it necessary for a new trial? (California, United States of America)

Can a judge who is a defendant in a civil matter refuse to testify as a witness or witness? (California, United States of America)

Does a promise of leniency from a detective at trial and on appeal in a sexual assault case affect the credibility of a witness at trial? (California, United States of America)