The defense called Dr. David Fowler, a retired forensic pathologist, to the stand Wednesday to testify in the Derek Chauvin trial. Fowler said he believes Floyd breathed in chemical exhaust from the squad car while he was being restrained on the ground. He does not believe carbon monoxide killed Floyd, but said it was a significant contributing factor in his death because it robbed him of his extra oxygen capacity. Subscribe to FOX 9 Minneapolis-St. Paul / @fox9 Watch FOX 9 Live: https://www.fox9.com/live FOX 9 is your source for breaking news, live events, investigations, politics, entertainment, business news and local stories from Minneapolis-St. Paul, the greater Twin Cities metro, Greater Minnesota, western Wisconsin and across the nation. FOX 9 is the Official Home of the Minnesota Vikings and proud partner of University of Minnesota Golden Gophers Athletics. Download the FOX 9 News app: https://fox9.onelink.me/sFfg?pid=soci... Download the Weather app Google Play: https://play.google.com/store/apps/de... App Store: https://apps.apple.com/us/app/fox-9-w... Follow FOX 9 on Facebook: / fox9kmsp Follow FOX 9 on Twitter: / fox9 Follow FOX 9 on Instagram: / fox9 Subscribe to the FOX 9 newsletter: https://www.fox9.com/email