The state had two expert witnesses testify Wednesday that George Floyd died as a result of having no oxygen left in his body. Dr. Bill Smock, a forensic specialist and police surgeon from Kentucky, testified, based on video and medical evidence, he didn’t see signs of George Floyd having a fentanyl overdose:

Dr. Smock testified that Floyd was a chronic drug user, and had built up a high rate of tolerance. Responding to questions from defense attorney Eric Nelson, Dr. Smock confirmed that Floyd had low levels of meth in his system, and admitted that can increase heart rate, in some cases. Dr. Smock also testified there “is no safe level of meth.”