EXPLAINER: Doctor's testimony details Floyd's heart activity MARILYNN MARCHIONE, AP Chief Medical Writer April 5, 2021 FacebookTwitterEmail In this image from video, witness Dr. Bradford Wankhede Langenfeld, the doctor who pronounced George Floyd dead, testifies as Hennepin County Judge Peter Cahill presides Monday, April 5, 2021, in the trial of former Minneapolis police Officer Derek Chauvin at the Hennepin County Courthouse in Minneapolis. Chauvin is charged in the May 25, 2020 death of George Floyd. (Court TV via AP, Pool)AP George Floyd had “pulseless electrical activity” and his heart wasn’t beating when he arrived at a Minneapolis hospital, a doctor testified Monday. Dr. Bradford Langenfeld was on duty at Hennepin County Medical Center the night Floyd was brought in after being restrained by police last May, and testified Monday at the trial of one of the officers.