Yes, the former police officer, Barry Brodd, who testified as a defense witness during the trial for Derek Chauvin – the police officer charged with the murder of George Floyd – appeared in a pro-Trump advertisement. This was prior to his involvement in the trial. This fact has caused some controversy as it can potentially introduce bias, given the political tensions in the United States regarding police brutality and race relations. However, his role in the ad does not directly relate to his assessment of police practices used during George Floyd’s arrest. His expert opinion was sought after in the trial because of his experience with tactics and use of force in law enforcement.