Donald Williams, 33, the MMA practitioner who was present at the fatal arrest and called as an expert witness, faced questions over his training and conduct on the day, which was captured on a widely-seen video. Williams’s testimony on the first day of Chauvin’s trial painted a picture of the former police officer showing indifference to Floyd’s suffering, a key component of the charge of third-degree murder known as “depraved mind” or a “depraved-heart murder”. Michael Padden, a Minneapolis-based lawyer with 34 years’ experience trying cases, often involving the Minneapolis Police Department (MPD), described Williams as a “[g]ood, solid witness...