Das didn't exactly exonerate him....it was a chain of custody ruling. He never said he didn't test positive. Ban substance could have been a masking agent to hide a PED...... Das ruled in Braun's favor because of a chain-of-custody dispute that occurred after his urine sample was taken during an early October drug test. People familiar with the details said the sample was not dropped off that day at FedEx to be sent to the MLB testing lab in Montreal because the collector thought it was too late and the shipping company was closed. Instead, the collector kept the sample, and perhaps others, refrigerated at home for two days before making the shipment. Though the seals on the samples were unbroken upon arriving at the lab, that lapse in protocol became the crux of the hearing in which Braun's side contested the validity of the test itself. The MLB drug policy states that "absent unusual circumstances, the specimens should be sent by FedEx to the laboratory on the same day they are collected." The policy goes on to say, "If the specimen is not immediately prepared for shipment, the collector shall ensure that it is appropriately safeguarded during temporary storage. The collector must keep the chain of custody intact. The collector must store the samples in a cool and secure location."