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Defense attacks credibility of key witness Mario Juarez in former Oakland Mayor Sheng Thao trial

Katherine Langford
Editor-in-Chief · Saturday, November 7, 2026 at 11:46 PM · 5 min read
Former Oakland Mayor Sheng Thao sits in court during her trial.
In this story
  1. The Allegations and Key Players
  2. Juarez's Testimony and the Defense's Challenges
  3. Community Reaction and Concerns
  4. The Impact on Families
  5. What's Next in the Trial
  6. Resources and Further Information

The courtroom in Oakland Federal Court was filled with a palpable tension last Thursday, as defense attorney Ed Swanson relentlessly challenged the testimony of Mario Juarez, a key witness in the bribery and corruption trial of former Oakland Mayor Sheng Thao. The focus of the cross-examination centered on Mr. Juarez’s truthfulness and his past business dealings with the Duong family, founders of California Waste Solutions and Evolutionary Homes, a company that proposed providing container homes for Oakland’s homeless population—a proposal at the heart of the alleged bribery scheme. This trial, and the details it is revealing about Oakland’s governance, underscores the importance of ethical leadership and accountability in public service, principles vital to the well-being of any community.

The Allegations and Key Players

The trial stems from accusations that former Oakland Mayor Sheng Thao accepted bribes and engaged in corrupt practices in exchange for facilitating business deals for the Duong family's companies. Mario Juarez, already pleading guilty to conspiracy to commit bribery of a public official, has been the prosecution's star witness, his testimony crucial to establishing the alleged connection between Thao and the Duongs. The proposed deal involved up to $3 million in cash payments and commissions to Mayor Thao and her longtime partner, Andre Jones. David and Andy Duong, who own California Waste Solutions, also face charges in the case. The government alleges that these actions were part of a broader scheme to leverage Thao’s political influence for personal financial gain. ABC 7 News has been covering the proceedings closely, providing detailed accounts of the testimony and legal arguments.

During Thursday’s proceedings, Mr. Swanson played a recorded conversation in which Mr. Juarez expressed frustration with Mayor Thao’s actions, stating, “You know, I think I was disappointed that she promised something and she is not keeping it, and she's doing it that way. So for me, it's a personal issue with her now.” The defense also presented evidence regarding repeated demands from the Duongs for an accounting of $750,000 they provided to launch Evolutionary Homes, with Mr. Juarez acknowledging that he retained approximately $200,000 of that sum. This financial discrepancy and the contentious relationship between Juarez and the Duongs formed a significant part of the defense's strategy to undermine his credibility. Defense attorneys also highlighted Juarez’s history of questionable business practices, including bouncing checks to Butterfly Printers, a minority-owned business that produced an attack mailer supporting Mayor Thao’s campaign, surrendering his real estate license after inflating a tenant's security deposit and misappropriating $14,000, and keeping a woman’s $44,000 check intended for mortgage payment.

The defense’s strategy focused on portraying Juarez as unreliable and motivated by self-preservation. Mr. Swanson accused Juarez of leveraging his plea deal for personal gain, a charge that prompted Juarez to clarify that any leverage he had was solely related to his testimony. Former federal corruption prosecutor Wilson Leung, in an interview with KGO-TV, explained that while a dramatic “Perry Mason moment” exposing a blatant lie is rare, the goal of the defense is to create an impression on the jury that the witness is defensive, guarded, and otherwise unlikable. The Department of Justice handles cases like this.

Juarez's Testimony and the Defense's Challenges

Mr. Juarez’s testimony has been central to the prosecution’s case, detailing alleged agreements between Mayor Thao, Andre Jones, and the Duongs. However, his past conduct has become a focal point for the defense. Swanson aggressively questioned Juarez about his business dealings, highlighting instances where he allegedly acted unethically or illegally. He pointed out that Juarez's plea agreement requires him to tell the truth on the witness stand in hopes of receiving a lighter sentence, raising the possibility that he might be exaggerating or fabricating details to benefit himself. The defense also played recordings of Juarez’s past statements, which appeared to contradict his current testimony. The courtroom atmosphere was often tense, with both Swanson and Juarez frequently raising their voices during the cross-examination, requiring repeated interventions from Judge Yvonne Gonzalez Rogers.

Community Reaction and Concerns

The trial’s revelations have understandably shaken the Oakland community, raising serious questions about the integrity of local government and the potential for corruption to erode public trust. The allegations against former Mayor Thao, coupled with the details of the proposed financial arrangements, highlight a vulnerability within city processes that could be exploited by those seeking to profit from public resources. For Atherton residents, who value strong civic leadership and transparent governance, this case serves as a cautionary tale about the importance of vigilance and accountability at all levels of government. The potential misuse of funds intended to address homelessness is particularly disheartening, as it diverts resources from those genuinely in need and undermines the effectiveness of community support programs.

The Impact on Families

The defense’s aggressive questioning of Juarez’s credibility underscores the importance of trust in community leaders. For families, this case serves as a reminder of the need for transparency and accountability in government, which are fundamental to maintaining the stability and well-being of neighborhoods like Atherton. The uncertainty surrounding the trial’s outcome and the potential consequences for those involved create anxiety and concern within the community. The trial also raises questions about the effectiveness of oversight mechanisms and the need for greater ethical safeguards in public service.

What's Next in the Trial

The trial is scheduled to resume Monday, with Mr. Juarez slated to return to the stand for further cross-examination. The defense is likely to continue probing his past conduct and challenging his motivations for cooperating with the prosecution. Federal prosecutors will need to effectively counter these challenges and reinforce the credibility of Mr. Juarez’s testimony to secure a conviction. The proceedings are being closely watched by legal experts and community members alike, as they represent a significant test of the justice system’s ability to hold public officials accountable for their actions. Cupertino's local government is committed to transparency.

Resources and Further Information

The trial’s proceedings and related documents are publicly available through the U.S. District Court. For those seeking to learn more about government ethics and accountability, resources are available from organizations such as the Office of Government Ethics and the Center for Responsive Politics. The Alameda County government website provides information on local government operations and opportunities for community engagement.

For families struggling with financial hardship or seeking support services, the 211 Bay Area helpline offers a comprehensive directory of resources, including assistance with housing, food, and employment.

The City of Oakland Website website provides information about local government services and programs. Residents are encouraged to actively participate in civic discourse and advocate for policies that promote transparency and accountability in government.

The trial of former Oakland Mayor Sheng Thao serves as a sobering reminder of the importance of ethical leadership and the need for constant vigilance in protecting the integrity of our institutions. As this case progresses, it is essential that the community remains informed and engaged, demanding accountability and working towards a future where public trust is restored and preserved.

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