Heart disease and excessive weight killed Yvelt Occean after he struggled with police in April, and not the shocks of a police Taser that officers used to subdue him, authorities have concluded. After nearly eight months of investigation, the state medical examiner’s office has ruled that Occean, 31, died from coronary artery atherosclerosis—the principal cause of coronary artery disease—about 2½ hours after being shocked with a Taser on April 5 in New Kent County.