NASHVILLE (AP) — An autopsy has found that the son of Nashville Mayor Megan Barry died from a combination of several drugs, including two opioids.

The Tennessean reports that the drugs found in Max Barry's system after his death were Xanax, marijuana, methadone and hydromorphone. The autopsy also found he had recently used cocaine.

The 22-year-old died on July 29 near Denver. Hypertension and obesity were found to be contributing factors to his death.

Megan Barry has said her son completed a month of rehab last summer before going on to graduate from college. The mayor returned to work this week, saying she hopes her family's openness about their son's death will inspire parents to have frank conversations with their children about drugs.