Voir dire in Bexar County murder case focuses on law of parties, burden and interpreter access

Prospective jurors in the 187th District Court heard extended voir dire on Wednesday in State v. Marco Antonio Marino Vasquez as Judge Stephanie Boyd and counsel explained core legal concepts for the murder case, and the prosecution formally waived an abandoned count.

The court called 2023CR4371b, confirmed an interpreter would be used for the defendant, and the State moved to waive Count 3 of the indictment; the defense raised no objection and Judge Boyd ordered that count waived. Judge Boyd instructed the panel on the presumption of innocence, the defendant’s right to remain silent and that the State bears the burden of proving each element beyond a reasonable doubt.

Why it matters: The panel’s views on accomplice testimony, the law of parties and whether jurors can consider the full statutory punishment range (for murder, 5 to 99 years or life) determine whether potential jurors are qualified to serve in a case that may raise joint-liability and credibility issues.

The prosecutor, Megan Galloway, used hypotheticals to teach the panel about the law of parties — explaining how someone who solicits, encourages or directs another person may be criminally responsible for that person’s conduct. Galloway described a repeated voir-dire teaching point she calls the “Willie rule,” designed to test whether jurors can follow instructions they disagree with: “Do you understand the law? Do you disagree with the law? And even if you disagree with it, can you follow the law?” she asked. She also polled jurors on how they would treat testimony from a codefendant and whether they would automatically discount or instead assess such testimony against other evidence.

Defense attorney David Garcia framed his questioning around the State’s heavy burden. "This is the most important thing in his life," Garcia said of his client, urging jurors to hold the State to proof beyond a reasonable doubt and to apply common sense when weighing evidence and witness credibility.

The judge and both parties covered procedural accommodations: Judge Boyd swore the court interpreter and reminded jurors that if a panelist relies on interpretation, other jurors must accept the official interpretation rather than substitute their own. The judge also explained ranges of punishment for the charged offenses, asking whether jurors could consider the full statutory ranges in the event of a guilty verdict.

Panel responses showed variation on key issues: some jurors said they would start a testifying codefendant on an “even playing field” and evaluate credibility against other evidence; others reported they would give such testimony low or no confidence. A subset of jurors said they would require proof of motive before rendering a verdict, and the attorneys followed up individually on those responses.

Formal actions and next steps: The court recorded the State’s motion to waive Count 3 as granted. Judge Boyd recessed the panel for a 20-minute break and indicated testimony would begin that afternoon; she estimated the trial could conclude by Monday, though she did not set a definitive end date.

The court record for the day shows the parties completed initial jury qualification and substantive instruction; further voir dire and the trial record will resume after the break and proceed according to the judge’s schedule.