(CLEVELAND) - Cleveland police say detectives are investigating the death of a 2-year-old boy, who tested positive for Methadone. The boy's grandmother, who was taking care of him on Monday, is a recovering heroin addict, and takes Methadone daily. The boy was found unresponsive in his crib at his W. 20th Street home on Monday. His family took him to MetroHealth, where he died Tuesday morning. WTAM's news partner, Channel 3, reported that the boy's mother left him in the care of his grandmother while she went to work, and when she returned home for her lunch break, she said her son seemed "sad and clingy" and begged her not to leave. Later that evening, the boy was found unresponsive. According to a police report, doctors said the boy tested positive for Methadone.