TULSA – The teenage mother of a baby killed by one of the family's pet dogs “smoked a bowl of marijuana” a few hours after her baby died, according to records released Wednesday by the Office of Juvenile Affairs. Linzy Earles, 18, of Tulsa, is charged in Tulsa County District Court in the juvenile division with second-degree manslaughter. She is accused of leaving Zane Earles, her 2-month-old son, alone and unsupervised on July 28 with a hungry dog, according to the petition. Earles was charged as a juvenile because the alleged criminal act occurred July 28, when she was 17. Earles turned 18 on Oct. 24, records show. Earles told police on the day her son died that she took speed when she was 13 and had a drug problem in the past but was not then using drugs, according to records. Her confession of marijuana use turned up when she had to undergo a blood test the day after Zane’s death. At the time of Zane’s death, Earles was on probation for theft of a controlled substance, according to a July 29 Department of Human Services report that included information provided by the Department of Juvenile Probation. The report was provided by DHS to Tulsa police to help police in their investigation. Earles frequently tested positive for drug use during her probation, but did stop using drugs during her pregnancy, the report stated. A DHS worker quoted in the report said a juvenile probation officer told her he feared Earles would go back to using drugs when her probation ended, the report stated.