The arrest warrant for a Danbury woman charged in the death of her grandson has been unsealed. 60-year old Cora Brandon was arrested at the end of last month for the March 17th untimely death of the 1-year-old.  An autopsy found nothing suspicious, but toxicology results later revealed he had fentanyl and xylazine in his blood. Xylazine can be used as a sedative, among other uses.  According to the warrant, Five milligrams of undigested fentanyl had also been found in the baby’s stomach.  Arresting documents revealed that the boy's mother dropped her son off before work after he got vaccines earlier that morning.  When her mother said the boy was unresponsive, she picked him up and went to the hospital.  Police seized a glassine bag from a vacuum dust collection canister.  A cut straw found in the sofa where the baby had been sleeping tested positive for fentanyl.